added geoengine

1 files changed, 2226 insertions, 0 deletions

diff --git a/base_geoengine/static/lib/chromajs-0.8.0/chroma.js b/base_geoengine/static/lib/chromajs-0.8.0/chroma.js
new file mode 100644
index 0000000..f7d361f
--- /dev/null
+++ b/base_geoengine/static/lib/chromajs-0.8.0/chroma.js
@@ -0,0 +1,2226 @@
+
+/**
+ * @license
+ *
+ * chroma.js - JavaScript library for color conversions
+ * 
+ * Copyright (c) 2011-2015, Gregor Aisch
+ * All rights reserved.
+ * 
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ * 
+ * 1. Redistributions of source code must retain the above copyright notice, this
+ *    list of conditions and the following disclaimer.
+ * 
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ * 
+ * 3. The name Gregor Aisch may not be used to endorse or promote products
+ *    derived from this software without specific prior written permission.
+ * 
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ * DISCLAIMED. IN NO EVENT SHALL GREGOR AISCH OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
+ * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+ * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
+ * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
+ * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
+ * EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+(function() {
+  var Color, K, PITHIRD, TWOPI, X, Y, Z, bezier, blend, blend_f, brewer, burn, chroma, clip_rgb, cmyk2rgb, colors, cos, css2rgb, darken, dodge, each, floor, hex2rgb, hsi2rgb, hsl2rgb, hsv2rgb, lab2lch, lab2rgb, lab_xyz, lch2lab, lch2rgb, lighten, limit, log, luminance, luminance_x, multiply, normal, num2rgb, overlay, pow, rgb2cmyk, rgb2hex, rgb2hsi, rgb2hsl, rgb2hsv, rgb2lab, rgb2lch, rgb2num, rgb2temp, rgb2xyz, rgb_xyz, root, round, screen, sin, temp2rgb, type, unpack, xyz_lab, xyz_rgb,
+    slice = [].slice;
+
+  chroma = function() {
+    return (function(func, args, ctor) {
+      ctor.prototype = func.prototype;
+      var child = new ctor, result = func.apply(child, args);
+      return Object(result) === result ? result : child;
+    })(Color, arguments, function(){});
+  };
+
+  if ((typeof module !== "undefined" && module !== null) && (module.exports != null)) {
+    module.exports = chroma;
+  }
+
+  if (typeof define === 'function' && define.amd) {
+    define([], function() {
+      return chroma;
+    });
+  } else {
+    root = typeof exports !== "undefined" && exports !== null ? exports : this;
+    root.chroma = chroma;
+  }
+
+  chroma.color = function(x, y, z, m) {
+    return new Color(x, y, z, m);
+  };
+
+  chroma.hsl = function(h, s, l, a) {
+    return new Color(h, s, l, a, 'hsl');
+  };
+
+  chroma.hsv = function(h, s, v, a) {
+    return new Color(h, s, v, a, 'hsv');
+  };
+
+  chroma.rgb = function(r, g, b, a) {
+    return new Color(r, g, b, a, 'rgb');
+  };
+
+  chroma.hex = function(x) {
+    return new Color(x);
+  };
+
+  chroma.css = function(x) {
+    return new Color(x);
+  };
+
+  chroma.lab = function(l, a, b) {
+    return new Color(l, a, b, 'lab');
+  };
+
+  chroma.lch = function(l, c, h) {
+    return new Color(l, c, h, 'lch');
+  };
+
+  chroma.hsi = function(h, s, i) {
+    return new Color(h, s, i, 'hsi');
+  };
+
+  chroma.gl = function(r, g, b, a) {
+    return new Color(r, g, b, a, 'gl');
+  };
+
+  chroma.num = function(n) {
+    return new Color(n, 'num');
+  };
+
+  chroma.cmyk = function() {
+    return (function(func, args, ctor) {
+      ctor.prototype = func.prototype;
+      var child = new ctor, result = func.apply(child, args);
+      return Object(result) === result ? result : child;
+    })(Color, slice.call(arguments).concat(['cmyk']), function(){});
+  };
+
+  chroma.random = function() {
+    var code, digits, i, o;
+    digits = '0123456789abcdef';
+    code = '#';
+    for (i = o = 0; o < 6; i = ++o) {
+      code += digits.charAt(floor(Math.random() * 16));
+    }
+    return new Color(code);
+  };
+
+  chroma.interpolate = function(a, b, f, m) {
+    var ref, ref1;
+    if ((a == null) || (b == null)) {
+      return '#000';
+    }
+    if ((ref = type(a)) === 'string' || ref === 'number') {
+      a = new Color(a);
+    }
+    if ((ref1 = type(b)) === 'string' || ref1 === 'number') {
+      b = new Color(b);
+    }
+    return a.interpolate(f, b, m);
+  };
+
+  chroma.mix = chroma.interpolate;
+
+  chroma.contrast = function(a, b) {
+    var l1, l2, ref, ref1;
+    if ((ref = type(a)) === 'string' || ref === 'number') {
+      a = new Color(a);
+    }
+    if ((ref1 = type(b)) === 'string' || ref1 === 'number') {
+      b = new Color(b);
+    }
+    l1 = a.luminance();
+    l2 = b.luminance();
+    if (l1 > l2) {
+      return (l1 + 0.05) / (l2 + 0.05);
+    } else {
+      return (l2 + 0.05) / (l1 + 0.05);
+    }
+  };
+
+  chroma.luminance = function(color) {
+    return chroma(color).luminance();
+  };
+
+  chroma.kelvin = function(k) {
+    return chroma(temp2rgb(k), 'rgb');
+  };
+
+  chroma.version = '0.8.0';
+
+  chroma._Color = Color;
+
+
+  /**
+      chroma.js
+  
+      Copyright (c) 2011-2013, Gregor Aisch
+      All rights reserved.
+  
+      Redistribution and use in source and binary forms, with or without
+      modification, are permitted provided that the following conditions are met:
+  
+      * Redistributions of source code must retain the above copyright notice, this
+        list of conditions and the following disclaimer.
+  
+      * Redistributions in binary form must reproduce the above copyright notice,
+        this list of conditions and the following disclaimer in the documentation
+        and/or other materials provided with the distribution.
+  
+      * The name Gregor Aisch may not be used to endorse or promote products
+        derived from this software without specific prior written permission.
+  
+      THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+      AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+      IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+      DISCLAIMED. IN NO EVENT SHALL GREGOR AISCH OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
+      INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+      BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+      DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
+      OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
+      NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
+      EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+  
+      @source: https://github.com/gka/chroma.js
+   */
+
+  Color = (function() {
+    function Color() {
+      var a, arg, args, len, m, me, me_rgb, o, ref, ref1, ref2, ref3, ref4, x, y, z;
+      me = this;
+      args = [];
+      for (o = 0, len = arguments.length; o < len; o++) {
+        arg = arguments[o];
+        if (arg != null) {
+          args.push(arg);
+        }
+      }
+      if (args.length === 0) {
+        ref = [255, 0, 255, 1, 'rgb'], x = ref[0], y = ref[1], z = ref[2], a = ref[3], m = ref[4];
+      } else if (type(args[0]) === "array") {
+        if (args[0].length === 3) {
+          ref1 = args[0], x = ref1[0], y = ref1[1], z = ref1[2];
+          a = 1;
+        } else if (args[0].length === 4) {
+          ref2 = args[0], x = ref2[0], y = ref2[1], z = ref2[2], a = ref2[3];
+        } else {
+          throw 'unknown input argument';
+        }
+        m = (ref3 = args[1]) != null ? ref3 : 'rgb';
+      } else if (type(args[0]) === "string") {
+        x = args[0];
+        m = 'hex';
+      } else if (type(args[0]) === "object") {
+        ref4 = args[0]._rgb, x = ref4[0], y = ref4[1], z = ref4[2], a = ref4[3];
+        m = 'rgb';
+      } else if (args.length <= 2 && type(args[0]) === "number") {
+        x = args[0];
+        m = 'num';
+      } else if (args.length >= 3) {
+        x = args[0];
+        y = args[1];
+        z = args[2];
+      }
+      if (args.length === 3) {
+        m = 'rgb';
+        a = 1;
+      } else if (args.length === 4) {
+        if (type(args[3]) === "string") {
+          m = args[3];
+          a = 1;
+        } else if (type(args[3]) === "number") {
+          m = 'rgb';
+          a = args[3];
+        }
+      } else if (args.length === 5) {
+        a = args[3];
+        m = args[4];
+      }
+      if (m !== 'cmyk') {
+        if (a == null) {
+          a = 1;
+        }
+      }
+      if (m === 'rgb') {
+        me._rgb = [x, y, z, a];
+      } else if (m === 'gl') {
+        me._rgb = [x * 255, y * 255, z * 255, a];
+      } else if (m === 'hsl') {
+        me._rgb = hsl2rgb(x, y, z);
+        me._rgb[3] = a;
+      } else if (m === 'hsv') {
+        me._rgb = hsv2rgb(x, y, z);
+        me._rgb[3] = a;
+      } else if (m === 'hex') {
+        me._rgb = hex2rgb(x);
+      } else if (m === 'lab') {
+        me._rgb = lab2rgb(x, y, z);
+        me._rgb[3] = a;
+      } else if (m === 'lch') {
+        me._rgb = lch2rgb(x, y, z);
+        me._rgb[3] = a;
+      } else if (m === 'hsi') {
+        me._rgb = hsi2rgb(x, y, z);
+        me._rgb[3] = a;
+      } else if (m === 'num') {
+        me._rgb = num2rgb(x);
+      } else if (m === 'cmyk') {
+        me._rgb = cmyk2rgb(x, y, z, a);
+      }
+      me_rgb = clip_rgb(me._rgb);
+    }
+
+    Color.prototype.rgb = function() {
+      return this._rgb.slice(0, 3);
+    };
+
+    Color.prototype.rgba = function() {
+      return this._rgb;
+    };
+
+    Color.prototype.hex = function(mode) {
+      if (mode == null) {
+        mode = 'rgb';
+      }
+      return rgb2hex(this._rgb, mode);
+    };
+
+    Color.prototype.toString = function() {
+      return this.name();
+    };
+
+    Color.prototype.hsl = function() {
+      return rgb2hsl(this._rgb);
+    };
+
+    Color.prototype.hsv = function() {
+      return rgb2hsv(this._rgb);
+    };
+
+    Color.prototype.lab = function() {
+      return rgb2lab(this._rgb);
+    };
+
+    Color.prototype.lch = function() {
+      return rgb2lch(this._rgb);
+    };
+
+    Color.prototype.hsi = function() {
+      return rgb2hsi(this._rgb);
+    };
+
+    Color.prototype.gl = function() {
+      return [this._rgb[0] / 255, this._rgb[1] / 255, this._rgb[2] / 255, this._rgb[3]];
+    };
+
+    Color.prototype.num = function() {
+      return rgb2num(this._rgb);
+    };
+
+    Color.prototype.luminance = function(lum, mode) {
+      var cur_lum, eps, max_iter, test;
+      if (mode == null) {
+        mode = 'rgb';
+      }
+      if (!arguments.length) {
+        return luminance(this._rgb);
+      }
+      if (lum === 0) {
+        this._rgb = [0, 0, 0, this._rgb[3]];
+      }
+      if (lum === 1) {
+        this._rgb = [255, 255, 255, this._rgb[3]];
+      }
+      cur_lum = luminance(this._rgb);
+      eps = 1e-7;
+      max_iter = 20;
+      test = function(l, h) {
+        var lm, m;
+        m = l.interpolate(0.5, h, mode);
+        lm = m.luminance();
+        if (Math.abs(lum - lm) < eps || !max_iter--) {
+          return m;
+        }
+        if (lm > lum) {
+          return test(l, m);
+        }
+        return test(m, h);
+      };
+      this._rgb = (cur_lum > lum ? test(new Color('black'), this) : test(this, new Color('white'))).rgba();
+      return this;
+    };
+
+    Color.prototype.name = function() {
+      var h, k;
+      h = this.hex();
+      for (k in chroma.colors) {
+        if (h === chroma.colors[k]) {
+          return k;
+        }
+      }
+      return h;
+    };
+
+    Color.prototype.alpha = function(alpha) {
+      if (arguments.length) {
+        this._rgb[3] = alpha;
+        return this;
+      }
+      return this._rgb[3];
+    };
+
+    Color.prototype.css = function(mode) {
+      var hsl, me, rgb, rnd;
+      if (mode == null) {
+        mode = 'rgb';
+      }
+      me = this;
+      rgb = me._rgb;
+      if (mode.length === 3 && rgb[3] < 1) {
+        mode += 'a';
+      }
+      if (mode === 'rgb') {
+        return mode + '(' + rgb.slice(0, 3).map(round).join(',') + ')';
+      } else if (mode === 'rgba') {
+        return mode + '(' + rgb.slice(0, 3).map(round).join(',') + ',' + rgb[3] + ')';
+      } else if (mode === 'hsl' || mode === 'hsla') {
+        hsl = me.hsl();
+        rnd = function(a) {
+          return round(a * 100) / 100;
+        };
+        hsl[0] = rnd(hsl[0] || 0);
+        hsl[1] = rnd(hsl[1] * 100) + '%';
+        hsl[2] = rnd(hsl[2] * 100) + '%';
+        if (mode.length === 4) {
+          hsl[3] = rgb[3];
+        }
+        return mode + '(' + hsl.join(',') + ')';
+      }
+    };
+
+    Color.prototype.interpolate = function(f, col, m) {
+
+      /*
+      interpolates between colors
+      f = 0 --> me
+      f = 1 --> col
+       */
+      var dh, hue, hue0, hue1, lbv, lbv0, lbv1, me, res, sat, sat0, sat1, xyz0, xyz1;
+      me = this;
+      if (m == null) {
+        m = 'rgb';
+      }
+      if (type(col) === "string") {
+        col = new Color(col);
+      }
+      if (m === 'hsl' || m === 'hsv' || m === 'lch' || m === 'hsi') {
+        if (m === 'hsl') {
+          xyz0 = me.hsl();
+          xyz1 = col.hsl();
+        } else if (m === 'hsv') {
+          xyz0 = me.hsv();
+          xyz1 = col.hsv();
+        } else if (m === 'hsi') {
+          xyz0 = me.hsi();
+          xyz1 = col.hsi();
+        } else if (m === 'lch') {
+          xyz0 = me.lch();
+          xyz1 = col.lch();
+        }
+        if (m.substr(0, 1) === 'h') {
+          hue0 = xyz0[0], sat0 = xyz0[1], lbv0 = xyz0[2];
+          hue1 = xyz1[0], sat1 = xyz1[1], lbv1 = xyz1[2];
+        } else {
+          lbv0 = xyz0[0], sat0 = xyz0[1], hue0 = xyz0[2];
+          lbv1 = xyz1[0], sat1 = xyz1[1], hue1 = xyz1[2];
+        }
+        if (!isNaN(hue0) && !isNaN(hue1)) {
+          if (hue1 > hue0 && hue1 - hue0 > 180) {
+            dh = hue1 - (hue0 + 360);
+          } else if (hue1 < hue0 && hue0 - hue1 > 180) {
+            dh = hue1 + 360 - hue0;
+          } else {
+            dh = hue1 - hue0;
+          }
+          hue = hue0 + f * dh;
+        } else if (!isNaN(hue0)) {
+          hue = hue0;
+          if ((lbv1 === 1 || lbv1 === 0) && m !== 'hsv') {
+            sat = sat0;
+          }
+        } else if (!isNaN(hue1)) {
+          hue = hue1;
+          if ((lbv0 === 1 || lbv0 === 0) && m !== 'hsv') {
+            sat = sat1;
+          }
+        } else {
+          hue = Number.NaN;
+        }
+        if (sat == null) {
+          sat = sat0 + f * (sat1 - sat0);
+        }
+        lbv = lbv0 + f * (lbv1 - lbv0);
+        if (m.substr(0, 1) === 'h') {
+          res = new Color(hue, sat, lbv, m);
+        } else {
+          res = new Color(lbv, sat, hue, m);
+        }
+      } else if (m === 'rgb') {
+        xyz0 = me._rgb;
+        xyz1 = col._rgb;
+        res = new Color(xyz0[0] + f * (xyz1[0] - xyz0[0]), xyz0[1] + f * (xyz1[1] - xyz0[1]), xyz0[2] + f * (xyz1[2] - xyz0[2]), m);
+      } else if (m === 'num') {
+        if (!(col instanceof Color)) {
+          col = new Color(col, m);
+        }
+        xyz0 = me._rgb;
+        xyz1 = col._rgb;
+        res = new Color(((xyz0[0] + f * (xyz1[0] - xyz0[0])) << 16) + ((xyz0[1] + f * (xyz1[1] - xyz0[1])) << 8) + ((xyz0[2] + f * (xyz1[2] - xyz0[2])) & 0xff), m);
+      } else if (m === 'lab') {
+        xyz0 = me.lab();
+        xyz1 = col.lab();
+        res = new Color(xyz0[0] + f * (xyz1[0] - xyz0[0]), xyz0[1] + f * (xyz1[1] - xyz0[1]), xyz0[2] + f * (xyz1[2] - xyz0[2]), m);
+      } else {
+        throw "color mode " + m + " is not supported";
+      }
+      res.alpha(me.alpha() + f * (col.alpha() - me.alpha()));
+      return res;
+    };
+
+    Color.prototype.mix = function(f, col, m) {
+      return this.interpolate(f, col, m);
+    };
+
+    Color.prototype.premultiply = function() {
+      var a, rgb;
+      rgb = this.rgb();
+      a = this.alpha();
+      return chroma(rgb[0] * a, rgb[1] * a, rgb[2] * a, a);
+    };
+
+    Color.prototype.darken = function(amount) {
+      var lch, me;
+      if (amount == null) {
+        amount = 20;
+      }
+      me = this;
+      lch = me.lch();
+      lch[0] -= amount;
+      return chroma.lch(lch).alpha(me.alpha());
+    };
+
+    Color.prototype.darker = function(amount) {
+      return this.darken(amount);
+    };
+
+    Color.prototype.brighten = function(amount) {
+      if (amount == null) {
+        amount = 20;
+      }
+      return this.darken(-amount);
+    };
+
+    Color.prototype.brighter = function(amount) {
+      return this.brighten(amount);
+    };
+
+    Color.prototype.saturate = function(amount) {
+      var lch, me;
+      if (amount == null) {
+        amount = 20;
+      }
+      me = this;
+      lch = me.lch();
+      lch[1] += amount;
+      return chroma.lch(lch).alpha(me.alpha());
+    };
+
+    Color.prototype.desaturate = function(amount) {
+      if (amount == null) {
+        amount = 20;
+      }
+      return this.saturate(-amount);
+    };
+
+    Color.prototype.blend = function(col, mode) {
+      return chroma.blend(this, col, mode);
+    };
+
+    Color.prototype.kelvin = function() {
+      return rgb2temp(this._rgb);
+    };
+
+    Color.prototype.cmyk = function() {
+      return rgb2cmyk(this._rgb);
+    };
+
+    return Color;
+
+  })();
+
+  clip_rgb = function(rgb) {
+    var i;
+    for (i in rgb) {
+      if (i < 3) {
+        if (rgb[i] < 0) {
+          rgb[i] = 0;
+        }
+        if (rgb[i] > 255) {
+          rgb[i] = 255;
+        }
+      } else if (i === 3) {
+        if (rgb[i] < 0) {
+          rgb[i] = 0;
+        }
+        if (rgb[i] > 1) {
+          rgb[i] = 1;
+        }
+      }
+    }
+    return rgb;
+  };
+
+  rgb2cmyk = function() {
+    var b, c, f, g, k, m, r, ref, y;
+    ref = unpack(arguments), r = ref[0], g = ref[1], b = ref[2];
+    r = r / 255;
+    g = g / 255;
+    b = b / 255;
+    k = 1 - Math.max(r, Math.max(g, b));
+    f = k < 1 ? 1 / (1 - k) : 0;
+    c = (1 - r - k) * f;
+    m = (1 - g - k) * f;
+    y = (1 - b - k) * f;
+    return [c, m, y, k];
+  };
+
+  cmyk2rgb = function() {
+    var b, c, g, k, m, r, ref, y;
+    ref = unpack(arguments), c = ref[0], m = ref[1], y = ref[2], k = ref[3];
+    if (k === 1) {
+      return [0, 0, 0];
+    }
+    r = c >= 1 ? 0 : round(255 * (1 - c) * (1 - k));
+    g = m >= 1 ? 0 : round(255 * (1 - m) * (1 - k));
+    b = y >= 1 ? 0 : round(255 * (1 - y) * (1 - k));
+    return [r, g, b];
+  };
+
+  css2rgb = function(css) {
+    var aa, ab, hsl, i, m, o, rgb, w;
+    css = css.toLowerCase();
+    if ((chroma.colors != null) && chroma.colors[css]) {
+      return hex2rgb(chroma.colors[css]);
+    }
+    if (m = css.match(/rgb\(\s*(\-?\d+),\s*(\-?\d+)\s*,\s*(\-?\d+)\s*\)/)) {
+      rgb = m.slice(1, 4);
+      for (i = o = 0; o <= 2; i = ++o) {
+        rgb[i] = +rgb[i];
+      }
+      rgb[3] = 1;
+    } else if (m = css.match(/rgba\(\s*(\-?\d+),\s*(\-?\d+)\s*,\s*(\-?\d+)\s*,\s*([01]|[01]?\.\d+)\)/)) {
+      rgb = m.slice(1, 5);
+      for (i = w = 0; w <= 3; i = ++w) {
+        rgb[i] = +rgb[i];
+      }
+    } else if (m = css.match(/rgb\(\s*(\-?\d+(?:\.\d+)?)%,\s*(\-?\d+(?:\.\d+)?)%\s*,\s*(\-?\d+(?:\.\d+)?)%\s*\)/)) {
+      rgb = m.slice(1, 4);
+      for (i = aa = 0; aa <= 2; i = ++aa) {
+        rgb[i] = round(rgb[i] * 2.55);
+      }
+      rgb[3] = 1;
+    } else if (m = css.match(/rgba\(\s*(\-?\d+(?:\.\d+)?)%,\s*(\-?\d+(?:\.\d+)?)%\s*,\s*(\-?\d+(?:\.\d+)?)%\s*,\s*([01]|[01]?\.\d+)\)/)) {
+      rgb = m.slice(1, 5);
+      for (i = ab = 0; ab <= 2; i = ++ab) {
+        rgb[i] = round(rgb[i] * 2.55);
+      }
+      rgb[3] = +rgb[3];
+    } else if (m = css.match(/hsl\(\s*(\-?\d+(?:\.\d+)?),\s*(\-?\d+(?:\.\d+)?)%\s*,\s*(\-?\d+(?:\.\d+)?)%\s*\)/)) {
+      hsl = m.slice(1, 4);
+      hsl[1] *= 0.01;
+      hsl[2] *= 0.01;
+      rgb = hsl2rgb(hsl);
+      rgb[3] = 1;
+    } else if (m = css.match(/hsla\(\s*(\-?\d+(?:\.\d+)?),\s*(\-?\d+(?:\.\d+)?)%\s*,\s*(\-?\d+(?:\.\d+)?)%\s*,\s*([01]|[01]?\.\d+)\)/)) {
+      hsl = m.slice(1, 4);
+      hsl[1] *= 0.01;
+      hsl[2] *= 0.01;
+      rgb = hsl2rgb(hsl);
+      rgb[3] = +m[4];
+    }
+    return rgb;
+  };
+
+  hex2rgb = function(hex) {
+    var a, b, g, r, rgb, u;
+    if (hex.match(/^#?([A-Fa-f0-9]{6}|[A-Fa-f0-9]{3})$/)) {
+      if (hex.length === 4 || hex.length === 7) {
+        hex = hex.substr(1);
+      }
+      if (hex.length === 3) {
+        hex = hex.split("");
+        hex = hex[0] + hex[0] + hex[1] + hex[1] + hex[2] + hex[2];
+      }
+      u = parseInt(hex, 16);
+      r = u >> 16;
+      g = u >> 8 & 0xFF;
+      b = u & 0xFF;
+      return [r, g, b, 1];
+    }
+    if (hex.match(/^#?([A-Fa-f0-9]{8})$/)) {
+      if (hex.length === 9) {
+        hex = hex.substr(1);
+      }
+      u = parseInt(hex, 16);
+      r = u >> 24 & 0xFF;
+      g = u >> 16 & 0xFF;
+      b = u >> 8 & 0xFF;
+      a = round((u & 0xFF) / 0xFF * 100) / 100;
+      return [r, g, b, a];
+    }
+    if (rgb = css2rgb(hex)) {
+      return rgb;
+    }
+    throw "unknown color: " + hex;
+  };
+
+  hsi2rgb = function(h, s, i) {
+
+    /*
+    borrowed from here:
+    http://hummer.stanford.edu/museinfo/doc/examples/humdrum/keyscape2/hsi2rgb.cpp
+     */
+    var b, g, r, ref;
+    ref = unpack(arguments), h = ref[0], s = ref[1], i = ref[2];
+    h /= 360;
+    if (h < 1 / 3) {
+      b = (1 - s) / 3;
+      r = (1 + s * cos(TWOPI * h) / cos(PITHIRD - TWOPI * h)) / 3;
+      g = 1 - (b + r);
+    } else if (h < 2 / 3) {
+      h -= 1 / 3;
+      r = (1 - s) / 3;
+      g = (1 + s * cos(TWOPI * h) / cos(PITHIRD - TWOPI * h)) / 3;
+      b = 1 - (r + g);
+    } else {
+      h -= 2 / 3;
+      g = (1 - s) / 3;
+      b = (1 + s * cos(TWOPI * h) / cos(PITHIRD - TWOPI * h)) / 3;
+      r = 1 - (g + b);
+    }
+    r = limit(i * r * 3);
+    g = limit(i * g * 3);
+    b = limit(i * b * 3);
+    return [r * 255, g * 255, b * 255];
+  };
+
+  hsl2rgb = function() {
+    var b, c, g, h, i, l, o, r, ref, ref1, s, t1, t2, t3;
+    ref = unpack(arguments), h = ref[0], s = ref[1], l = ref[2];
+    if (s === 0) {
+      r = g = b = l * 255;
+    } else {
+      t3 = [0, 0, 0];
+      c = [0, 0, 0];
+      t2 = l < 0.5 ? l * (1 + s) : l + s - l * s;
+      t1 = 2 * l - t2;
+      h /= 360;
+      t3[0] = h + 1 / 3;
+      t3[1] = h;
+      t3[2] = h - 1 / 3;
+      for (i = o = 0; o <= 2; i = ++o) {
+        if (t3[i] < 0) {
+          t3[i] += 1;
+        }
+        if (t3[i] > 1) {
+          t3[i] -= 1;
+        }
+        if (6 * t3[i] < 1) {
+          c[i] = t1 + (t2 - t1) * 6 * t3[i];
+        } else if (2 * t3[i] < 1) {
+          c[i] = t2;
+        } else if (3 * t3[i] < 2) {
+          c[i] = t1 + (t2 - t1) * ((2 / 3) - t3[i]) * 6;
+        } else {
+          c[i] = t1;
+        }
+      }
+      ref1 = [round(c[0] * 255), round(c[1] * 255), round(c[2] * 255)], r = ref1[0], g = ref1[1], b = ref1[2];
+    }
+    return [r, g, b];
+  };
+
+  hsv2rgb = function() {
+    var b, f, g, h, i, p, q, r, ref, ref1, ref2, ref3, ref4, ref5, ref6, s, t, v;
+    ref = unpack(arguments), h = ref[0], s = ref[1], v = ref[2];
+    v *= 255;
+    if (s === 0) {
+      r = g = b = v;
+    } else {
+      if (h === 360) {
+        h = 0;
+      }
+      if (h > 360) {
+        h -= 360;
+      }
+      if (h < 0) {
+        h += 360;
+      }
+      h /= 60;
+      i = floor(h);
+      f = h - i;
+      p = v * (1 - s);
+      q = v * (1 - s * f);
+      t = v * (1 - s * (1 - f));
+      switch (i) {
+        case 0:
+          ref1 = [v, t, p], r = ref1[0], g = ref1[1], b = ref1[2];
+          break;
+        case 1:
+          ref2 = [q, v, p], r = ref2[0], g = ref2[1], b = ref2[2];
+          break;
+        case 2:
+          ref3 = [p, v, t], r = ref3[0], g = ref3[1], b = ref3[2];
+          break;
+        case 3:
+          ref4 = [p, q, v], r = ref4[0], g = ref4[1], b = ref4[2];
+          break;
+        case 4:
+          ref5 = [t, p, v], r = ref5[0], g = ref5[1], b = ref5[2];
+          break;
+        case 5:
+          ref6 = [v, p, q], r = ref6[0], g = ref6[1], b = ref6[2];
+      }
+    }
+    r = round(r);
+    g = round(g);
+    b = round(b);
+    return [r, g, b];
+  };
+
+  K = 18;
+
+  X = 0.950470;
+
+  Y = 1;
+
+  Z = 1.088830;
+
+  lab2lch = function() {
+    var a, b, c, h, l, ref;
+    ref = unpack(arguments), l = ref[0], a = ref[1], b = ref[2];
+    c = Math.sqrt(a * a + b * b);
+    h = (Math.atan2(b, a) / Math.PI * 180 + 360) % 360;
+    return [l, c, h];
+  };
+
+  lab2rgb = function(l, a, b) {
+
+    /*
+    adapted to match d3 implementation
+     */
+    var g, r, ref, ref1, x, y, z;
+    if (l !== void 0 && l.length === 3) {
+      ref = l, l = ref[0], a = ref[1], b = ref[2];
+    }
+    if (l !== void 0 && l.length === 3) {
+      ref1 = l, l = ref1[0], a = ref1[1], b = ref1[2];
+    }
+    y = (l + 16) / 116;
+    x = y + a / 500;
+    z = y - b / 200;
+    x = lab_xyz(x) * X;
+    y = lab_xyz(y) * Y;
+    z = lab_xyz(z) * Z;
+    r = xyz_rgb(3.2404542 * x - 1.5371385 * y - 0.4985314 * z);
+    g = xyz_rgb(-0.9692660 * x + 1.8760108 * y + 0.0415560 * z);
+    b = xyz_rgb(0.0556434 * x - 0.2040259 * y + 1.0572252 * z);
+    return [limit(r, 0, 255), limit(g, 0, 255), limit(b, 0, 255), 1];
+  };
+
+  lab_xyz = function(x) {
+    if (x > 0.206893034) {
+      return x * x * x;
+    } else {
+      return (x - 4 / 29) / 7.787037;
+    }
+  };
+
+  xyz_rgb = function(r) {
+    return round(255 * (r <= 0.00304 ? 12.92 * r : 1.055 * pow(r, 1 / 2.4) - 0.055));
+  };
+
+  lch2lab = function() {
+
+    /*
+    Convert from a qualitative parameter h and a quantitative parameter l to a 24-bit pixel. These formulas were invented by David Dalrymple to obtain maximum contrast without going out of gamut if the parameters are in the range 0-1.
+    A saturation multiplier was added by Gregor Aisch
+     */
+    var c, h, l, ref;
+    ref = unpack(arguments), l = ref[0], c = ref[1], h = ref[2];
+    h = h * Math.PI / 180;
+    return [l, Math.cos(h) * c, Math.sin(h) * c];
+  };
+
+  lch2rgb = function(l, c, h) {
+    var L, a, b, g, r, ref, ref1;
+    ref = lch2lab(l, c, h), L = ref[0], a = ref[1], b = ref[2];
+    ref1 = lab2rgb(L, a, b), r = ref1[0], g = ref1[1], b = ref1[2];
+    return [limit(r, 0, 255), limit(g, 0, 255), limit(b, 0, 255)];
+  };
+
+  luminance = function(r, g, b) {
+    var ref;
+    ref = unpack(arguments), r = ref[0], g = ref[1], b = ref[2];
+    r = luminance_x(r);
+    g = luminance_x(g);
+    b = luminance_x(b);
+    return 0.2126 * r + 0.7152 * g + 0.0722 * b;
+  };
+
+  luminance_x = function(x) {
+    x /= 255;
+    if (x <= 0.03928) {
+      return x / 12.92;
+    } else {
+      return Math.pow((x + 0.055) / 1.055, 2.4);
+    }
+  };
+
+  num2rgb = function(num) {
+    var b, g, r;
+    if (type(num) === "number" && num >= 0 && num <= 0xFFFFFF) {
+      r = num >> 16;
+      g = (num >> 8) & 0xFF;
+      b = num & 0xFF;
+      return [r, g, b, 1];
+    }
+    throw "unknown num color: " + num;
+  };
+
+  rgb2hex = function(channels, mode) {
+    var a, b, g, hxa, r, str, u;
+    if (mode == null) {
+      mode = 'rgb';
+    }
+    r = channels[0], g = channels[1], b = channels[2], a = channels[3];
+    u = r << 16 | g << 8 | b;
+    str = "000000" + u.toString(16);
+    str = str.substr(str.length - 6);
+    hxa = '0' + round(a * 255).toString(16);
+    hxa = hxa.substr(hxa.length - 2);
+    return "#" + (function() {
+      switch (mode.toLowerCase()) {
+        case 'rgba':
+          return str + hxa;
+        case 'argb':
+          return hxa + str;
+        default:
+          return str;
+      }
+    })();
+  };
+
+  rgb2hsi = function() {
+
+    /*
+    borrowed from here:
+    http://hummer.stanford.edu/museinfo/doc/examples/humdrum/keyscape2/rgb2hsi.cpp
+     */
+    var TWOPI, b, g, h, i, min, r, ref, s;
+    ref = unpack(arguments), r = ref[0], g = ref[1], b = ref[2];
+    TWOPI = Math.PI * 2;
+    r /= 255;
+    g /= 255;
+    b /= 255;
+    min = Math.min(r, g, b);
+    i = (r + g + b) / 3;
+    s = 1 - min / i;
+    if (s === 0) {
+      h = 0;
+    } else {
+      h = ((r - g) + (r - b)) / 2;
+      h /= Math.sqrt((r - g) * (r - g) + (r - b) * (g - b));
+      h = Math.acos(h);
+      if (b > g) {
+        h = TWOPI - h;
+      }
+      h /= TWOPI;
+    }
+    return [h * 360, s, i];
+  };
+
+  rgb2hsl = function(r, g, b) {
+    var h, l, max, min, ref, s;
+    if (r !== void 0 && r.length >= 3) {
+      ref = r, r = ref[0], g = ref[1], b = ref[2];
+    }
+    r /= 255;
+    g /= 255;
+    b /= 255;
+    min = Math.min(r, g, b);
+    max = Math.max(r, g, b);
+    l = (max + min) / 2;
+    if (max === min) {
+      s = 0;
+      h = Number.NaN;
+    } else {
+      s = l < 0.5 ? (max - min) / (max + min) : (max - min) / (2 - max - min);
+    }
+    if (r === max) {
+      h = (g - b) / (max - min);
+    } else if (g === max) {
+      h = 2 + (b - r) / (max - min);
+    } else if (b === max) {
+      h = 4 + (r - g) / (max - min);
+    }
+    h *= 60;
+    if (h < 0) {
+      h += 360;
+    }
+    return [h, s, l];
+  };
+
+  rgb2hsv = function() {
+    var b, delta, g, h, max, min, r, ref, s, v;
+    ref = unpack(arguments), r = ref[0], g = ref[1], b = ref[2];
+    min = Math.min(r, g, b);
+    max = Math.max(r, g, b);
+    delta = max - min;
+    v = max / 255.0;
+    if (max === 0) {
+      h = Number.NaN;
+      s = 0;
+    } else {
+      s = delta / max;
+      if (r === max) {
+        h = (g - b) / delta;
+      }
+      if (g === max) {
+        h = 2 + (b - r) / delta;
+      }
+      if (b === max) {
+        h = 4 + (r - g) / delta;
+      }
+      h *= 60;
+      if (h < 0) {
+        h += 360;
+      }
+    }
+    return [h, s, v];
+  };
+
+  rgb2lab = function() {
+    var b, g, r, ref, ref1, x, y, z;
+    ref = unpack(arguments), r = ref[0], g = ref[1], b = ref[2];
+    ref1 = rgb2xyz(r, g, b), x = ref1[0], y = ref1[1], z = ref1[2];
+    return [116 * y - 16, 500 * (x - y), 200 * (y - z)];
+  };
+
+  rgb_xyz = function(r) {
+    if ((r /= 255) <= 0.04045) {
+      return r / 12.92;
+    } else {
+      return Math.pow((r + 0.055) / 1.055, 2.4);
+    }
+  };
+
+  xyz_lab = function(x) {
+    if (x > 0.008856) {
+      return Math.pow(x, 1 / 3);
+    } else {
+      return 7.787037 * x + 4 / 29;
+    }
+  };
+
+  rgb2xyz = function() {
+    var b, g, r, ref, x, y, z;
+    ref = unpack(arguments), r = ref[0], g = ref[1], b = ref[2];
+    r = rgb_xyz(r);
+    g = rgb_xyz(g);
+    b = rgb_xyz(b);
+    x = xyz_lab((0.4124564 * r + 0.3575761 * g + 0.1804375 * b) / X);
+    y = xyz_lab((0.2126729 * r + 0.7151522 * g + 0.0721750 * b) / Y);
+    z = xyz_lab((0.0193339 * r + 0.1191920 * g + 0.9503041 * b) / Z);
+    return [x, y, z];
+  };
+
+  rgb2lch = function() {
+    var a, b, g, l, r, ref, ref1;
+    ref = unpack(arguments), r = ref[0], g = ref[1], b = ref[2];
+    ref1 = rgb2lab(r, g, b), l = ref1[0], a = ref1[1], b = ref1[2];
+    return lab2lch(l, a, b);
+  };
+
+  rgb2num = function() {
+    var b, g, r, ref;
+    ref = unpack(arguments), r = ref[0], g = ref[1], b = ref[2];
+    return (r << 16) + (g << 8) + b;
+  };
+
+  temp2rgb = function(kelvin) {
+    var b, g, r, temp;
+    temp = kelvin / 100;
+    if (temp < 66) {
+      r = 255;
+      g = -155.25485562709179 - 0.44596950469579133 * (g = temp - 2) + 104.49216199393888 * log(g);
+      b = temp < 20 ? 0 : -254.76935184120902 + 0.8274096064007395 * (b = temp - 10) + 115.67994401066147 * log(b);
+    } else {
+      r = 351.97690566805693 + 0.114206453784165 * (r = temp - 55) - 40.25366309332127 * log(r);
+      g = 325.4494125711974 + 0.07943456536662342 * (g = temp - 50) - 28.0852963507957 * log(g);
+      b = 255;
+    }
+    return clip_rgb([r, g, b]);
+  };
+
+  rgb2temp = function() {
+    var b, eps, g, maxTemp, minTemp, r, ref, rgb, temp;
+    ref = unpack(arguments), r = ref[0], g = ref[1], b = ref[2];
+    minTemp = 1000;
+    maxTemp = 40000;
+    eps = 0.4;
+    while (maxTemp - minTemp > eps) {
+      temp = (maxTemp + minTemp) * 0.5;
+      rgb = temp2rgb(temp);
+      if ((rgb[2] / rgb[0]) >= (b / r)) {
+        maxTemp = temp;
+      } else {
+        minTemp = temp;
+      }
+    }
+    return round(temp);
+  };
+
+
+  /*
+      chroma.js
+  
+      Copyright (c) 2011-2013, Gregor Aisch
+      All rights reserved.
+  
+      Redistribution and use in source and binary forms, with or without
+      modification, are permitted provided that the following conditions are met:
+  
+      * Redistributions of source code must retain the above copyright notice, this
+        list of conditions and the following disclaimer.
+  
+      * Redistributions in binary form must reproduce the above copyright notice,
+        this list of conditions and the following disclaimer in the documentation
+        and/or other materials provided with the distribution.
+  
+      * The name Gregor Aisch may not be used to endorse or promote products
+        derived from this software without specific prior written permission.
+  
+      THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+      AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+      IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+      DISCLAIMED. IN NO EVENT SHALL GREGOR AISCH OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
+      INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+      BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+      DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
+      OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
+      NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
+      EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+  
+      @source: https://github.com/gka/chroma.js
+   */
+
+  chroma.scale = function(colors, positions) {
+    var _colorCache, _colors, _correctLightness, _domain, _fixed, _max, _min, _mode, _nacol, _numClasses, _out, _pos, _spread, classifyValue, f, getClass, getColor, resetCache, setColors, setDomain, tmap;
+    _mode = 'rgb';
+    _nacol = chroma('#ccc');
+    _spread = 0;
+    _fixed = false;
+    _domain = [0, 1];
+    _colors = [];
+    _out = false;
+    _pos = [];
+    _min = 0;
+    _max = 1;
+    _correctLightness = false;
+    _numClasses = 0;
+    _colorCache = {};
+    setColors = function(colors, positions) {
+      var c, col, o, ref, ref1, ref2, w;
+      if (colors == null) {
+        colors = ['#ddd', '#222'];
+      }
+      if ((colors != null) && type(colors) === 'string' && (((ref = chroma.brewer) != null ? ref[colors] : void 0) != null)) {
+        colors = chroma.brewer[colors];
+      }
+      if (type(colors) === 'array') {
+        colors = colors.slice(0);
+        for (c = o = 0, ref1 = colors.length - 1; 0 <= ref1 ? o <= ref1 : o >= ref1; c = 0 <= ref1 ? ++o : --o) {
+          col = colors[c];
+          if (type(col) === "string") {
+            colors[c] = chroma(col);
+          }
+        }
+        if (positions != null) {
+          _pos = positions;
+        } else {
+          _pos = [];
+          for (c = w = 0, ref2 = colors.length - 1; 0 <= ref2 ? w <= ref2 : w >= ref2; c = 0 <= ref2 ? ++w : --w) {
+            _pos.push(c / (colors.length - 1));
+          }
+        }
+      }
+      resetCache();
+      return _colors = colors;
+    };
+    setDomain = function(domain) {
+      if (domain == null) {
+        domain = [];
+      }
+
+      /*
+       * use this if you want to display a limited number of data classes
+       * possible methods are "equalinterval", "quantiles", "custom"
+       */
+      _domain = domain;
+      _min = domain[0];
+      _max = domain[domain.length - 1];
+      resetCache();
+      if (domain.length === 2) {
+        return _numClasses = 0;
+      } else {
+        return _numClasses = domain.length - 1;
+      }
+    };
+    getClass = function(value) {
+      var i, n;
+      if (_domain != null) {
+        n = _domain.length - 1;
+        i = 0;
+        while (i < n && value >= _domain[i]) {
+          i++;
+        }
+        return i - 1;
+      }
+      return 0;
+    };
+    tmap = function(t) {
+      return t;
+    };
+    classifyValue = function(value) {
+      var i, maxc, minc, n, val;
+      val = value;
+      if (_domain.length > 2) {
+        n = _domain.length - 1;
+        i = getClass(value);
+        minc = _domain[0] + (_domain[1] - _domain[0]) * (0 + _spread * 0.5);
+        maxc = _domain[n - 1] + (_domain[n] - _domain[n - 1]) * (1 - _spread * 0.5);
+        val = _min + ((_domain[i] + (_domain[i + 1] - _domain[i]) * 0.5 - minc) / (maxc - minc)) * (_max - _min);
+      }
+      return val;
+    };
+    getColor = function(val, bypassMap) {
+      var c, col, f0, i, k, o, p, ref, t;
+      if (bypassMap == null) {
+        bypassMap = false;
+      }
+      if (isNaN(val)) {
+        return _nacol;
+      }
+      if (!bypassMap) {
+        if (_domain.length > 2) {
+          c = getClass(val);
+          t = c / (_numClasses - 1);
+        } else {
+          t = f0 = _min !== _max ? (val - _min) / (_max - _min) : 0;
+          t = f0 = (val - _min) / (_max - _min);
+          t = Math.min(1, Math.max(0, t));
+        }
+      } else {
+        t = val;
+      }
+      if (!bypassMap) {
+        t = tmap(t);
+      }
+      k = Math.floor(t * 10000);
+      if (_colorCache[k]) {
+        col = _colorCache[k];
+      } else {
+        if (type(_colors) === 'array') {
+          for (i = o = 0, ref = _pos.length - 1; 0 <= ref ? o <= ref : o >= ref; i = 0 <= ref ? ++o : --o) {
+            p = _pos[i];
+            if (t <= p) {
+              col = _colors[i];
+              break;
+            }
+            if (t >= p && i === _pos.length - 1) {
+              col = _colors[i];
+              break;
+            }
+            if (t > p && t < _pos[i + 1]) {
+              t = (t - p) / (_pos[i + 1] - p);
+              col = chroma.interpolate(_colors[i], _colors[i + 1], t, _mode);
+              break;
+            }
+          }
+        } else if (type(_colors) === 'function') {
+          col = _colors(t);
+        }
+        _colorCache[k] = col;
+      }
+      return col;
+    };
+    resetCache = function() {
+      return _colorCache = {};
+    };
+    setColors(colors, positions);
+    f = function(v) {
+      var c;
+      c = getColor(v);
+      if (_out && c[_out]) {
+        return c[_out]();
+      } else {
+        return c;
+      }
+    };
+    f.domain = function(domain, classes, mode, key) {
+      var d;
+      if (mode == null) {
+        mode = 'e';
+      }
+      if (!arguments.length) {
+        return _domain;
+      }
+      if (classes != null) {
+        d = chroma.analyze(domain, key);
+        if (classes === 0) {
+          domain = [d.min, d.max];
+        } else {
+          domain = chroma.limits(d, mode, classes);
+        }
+      }
+      setDomain(domain);
+      return f;
+    };
+    f.mode = function(_m) {
+      if (!arguments.length) {
+        return _mode;
+      }
+      _mode = _m;
+      resetCache();
+      return f;
+    };
+    f.range = function(colors, _pos) {
+      setColors(colors, _pos);
+      return f;
+    };
+    f.out = function(_o) {
+      _out = _o;
+      return f;
+    };
+    f.spread = function(val) {
+      if (!arguments.length) {
+        return _spread;
+      }
+      _spread = val;
+      return f;
+    };
+    f.correctLightness = function(v) {
+      if (!arguments.length) {
+        return _correctLightness;
+      }
+      _correctLightness = v;
+      resetCache();
+      if (_correctLightness) {
+        tmap = function(t) {
+          var L0, L1, L_actual, L_diff, L_ideal, max_iter, pol, t0, t1;
+          L0 = getColor(0, true).lab()[0];
+          L1 = getColor(1, true).lab()[0];
+          pol = L0 > L1;
+          L_actual = getColor(t, true).lab()[0];
+          L_ideal = L0 + (L1 - L0) * t;
+          L_diff = L_actual - L_ideal;
+          t0 = 0;
+          t1 = 1;
+          max_iter = 20;
+          while (Math.abs(L_diff) > 1e-2 && max_iter-- > 0) {
+            (function() {
+              if (pol) {
+                L_diff *= -1;
+              }
+              if (L_diff < 0) {
+                t0 = t;
+                t += (t1 - t) * 0.5;
+              } else {
+                t1 = t;
+                t += (t0 - t) * 0.5;
+              }
+              L_actual = getColor(t, true).lab()[0];
+              return L_diff = L_actual - L_ideal;
+            })();
+          }
+          return t;
+        };
+      } else {
+        tmap = function(t) {
+          return t;
+        };
+      }
+      return f;
+    };
+    f.colors = function(out) {
+      var i, len, o, ref, samples, w;
+      if (out == null) {
+        out = 'hex';
+      }
+      colors = [];
+      samples = [];
+      if (_domain.length > 2) {
+        for (i = o = 1, ref = _domain.length; 1 <= ref ? o < ref : o > ref; i = 1 <= ref ? ++o : --o) {
+          samples.push((_domain[i - 1] + _domain[i]) * 0.5);
+        }
+      } else {
+        samples = _domain;
+      }
+      for (w = 0, len = samples.length; w < len; w++) {
+        i = samples[w];
+        colors.push(f(i)[out]());
+      }
+      return colors;
+    };
+    return f;
+  };
+
+  if (chroma.scales == null) {
+    chroma.scales = {};
+  }
+
+  chroma.scales.cool = function() {
+    return chroma.scale([chroma.hsl(180, 1, .9), chroma.hsl(250, .7, .4)]);
+  };
+
+  chroma.scales.hot = function() {
+    return chroma.scale(['#000', '#f00', '#ff0', '#fff'], [0, .25, .75, 1]).mode('rgb');
+  };
+
+
+  /*
+      chroma.js
+  
+      Copyright (c) 2011-2013, Gregor Aisch
+      All rights reserved.
+  
+      Redistribution and use in source and binary forms, with or without
+      modification, are permitted provided that the following conditions are met:
+  
+      * Redistributions of source code must retain the above copyright notice, this
+        list of conditions and the following disclaimer.
+  
+      * Redistributions in binary form must reproduce the above copyright notice,
+        this list of conditions and the following disclaimer in the documentation
+        and/or other materials provided with the distribution.
+  
+      * The name Gregor Aisch may not be used to endorse or promote products
+        derived from this software without specific prior written permission.
+  
+      THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+      AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+      IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+      DISCLAIMED. IN NO EVENT SHALL GREGOR AISCH OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
+      INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+      BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+      DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
+      OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
+      NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
+      EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+  
+      @source: https://github.com/gka/chroma.js
+   */
+
+  chroma.analyze = function(data, key, filter) {
+    var add, k, len, o, r, val, visit;
+    r = {
+      min: Number.MAX_VALUE,
+      max: Number.MAX_VALUE * -1,
+      sum: 0,
+      values: [],
+      count: 0
+    };
+    if (filter == null) {
+      filter = function() {
+        return true;
+      };
+    }
+    add = function(val) {
+      if ((val != null) && !isNaN(val)) {
+        r.values.push(val);
+        r.sum += val;
+        if (val < r.min) {
+          r.min = val;
+        }
+        if (val > r.max) {
+          r.max = val;
+        }
+        r.count += 1;
+      }
+    };
+    visit = function(val, k) {
+      if (filter(val, k)) {
+        if ((key != null) && type(key) === 'function') {
+          return add(key(val));
+        } else if ((key != null) && type(key) === 'string' || type(key) === 'number') {
+          return add(val[key]);
+        } else {
+          return add(val);
+        }
+      }
+    };
+    if (type(data) === 'array') {
+      for (o = 0, len = data.length; o < len; o++) {
+        val = data[o];
+        visit(val);
+      }
+    } else {
+      for (k in data) {
+        val = data[k];
+        visit(val, k);
+      }
+    }
+    r.domain = [r.min, r.max];
+    r.limits = function(mode, num) {
+      return chroma.limits(r, mode, num);
+    };
+    return r;
+  };
+
+  chroma.limits = function(data, mode, num) {
+    var aa, ab, ac, ad, ae, af, ag, ah, ai, aj, ak, al, am, assignments, best, centroids, cluster, clusterSizes, dist, i, j, kClusters, limits, max, max_log, min, min_log, mindist, n, nb_iters, newCentroids, o, p, pb, pr, ref, ref1, ref10, ref11, ref12, ref13, ref14, ref2, ref3, ref4, ref5, ref6, ref7, ref8, ref9, repeat, sum, tmpKMeansBreaks, value, values, w;
+    if (mode == null) {
+      mode = 'equal';
+    }
+    if (num == null) {
+      num = 7;
+    }
+    if (type(data) === 'array') {
+      data = chroma.analyze(data);
+    }
+    min = data.min;
+    max = data.max;
+    sum = data.sum;
+    values = data.values.sort(function(a, b) {
+      return a - b;
+    });
+    limits = [];
+    if (mode.substr(0, 1) === 'c') {
+      limits.push(min);
+      limits.push(max);
+    }
+    if (mode.substr(0, 1) === 'e') {
+      limits.push(min);
+      for (i = o = 1, ref = num - 1; 1 <= ref ? o <= ref : o >= ref; i = 1 <= ref ? ++o : --o) {
+        limits.push(min + (i / num) * (max - min));
+      }
+      limits.push(max);
+    } else if (mode.substr(0, 1) === 'l') {
+      if (min <= 0) {
+        throw 'Logarithmic scales are only possible for values > 0';
+      }
+      min_log = Math.LOG10E * log(min);
+      max_log = Math.LOG10E * log(max);
+      limits.push(min);
+      for (i = w = 1, ref1 = num - 1; 1 <= ref1 ? w <= ref1 : w >= ref1; i = 1 <= ref1 ? ++w : --w) {
+        limits.push(pow(10, min_log + (i / num) * (max_log - min_log)));
+      }
+      limits.push(max);
+    } else if (mode.substr(0, 1) === 'q') {
+      limits.push(min);
+      for (i = aa = 1, ref2 = num - 1; 1 <= ref2 ? aa <= ref2 : aa >= ref2; i = 1 <= ref2 ? ++aa : --aa) {
+        p = values.length * i / num;
+        pb = floor(p);
+        if (pb === p) {
+          limits.push(values[pb]);
+        } else {
+          pr = p - pb;
+          limits.push(values[pb] * pr + values[pb + 1] * (1 - pr));
+        }
+      }
+      limits.push(max);
+    } else if (mode.substr(0, 1) === 'k') {
+
+      /*
+      implementation based on
+      http://code.google.com/p/figue/source/browse/trunk/figue.js#336
+      simplified for 1-d input values
+       */
+      n = values.length;
+      assignments = new Array(n);
+      clusterSizes = new Array(num);
+      repeat = true;
+      nb_iters = 0;
+      centroids = null;
+      centroids = [];
+      centroids.push(min);
+      for (i = ab = 1, ref3 = num - 1; 1 <= ref3 ? ab <= ref3 : ab >= ref3; i = 1 <= ref3 ? ++ab : --ab) {
+        centroids.push(min + (i / num) * (max - min));
+      }
+      centroids.push(max);
+      while (repeat) {
+        for (j = ac = 0, ref4 = num - 1; 0 <= ref4 ? ac <= ref4 : ac >= ref4; j = 0 <= ref4 ? ++ac : --ac) {
+          clusterSizes[j] = 0;
+        }
+        for (i = ad = 0, ref5 = n - 1; 0 <= ref5 ? ad <= ref5 : ad >= ref5; i = 0 <= ref5 ? ++ad : --ad) {
+          value = values[i];
+          mindist = Number.MAX_VALUE;
+          for (j = ae = 0, ref6 = num - 1; 0 <= ref6 ? ae <= ref6 : ae >= ref6; j = 0 <= ref6 ? ++ae : --ae) {
+            dist = Math.abs(centroids[j] - value);
+            if (dist < mindist) {
+              mindist = dist;
+              best = j;
+            }
+          }
+          clusterSizes[best]++;
+          assignments[i] = best;
+        }
+        newCentroids = new Array(num);
+        for (j = af = 0, ref7 = num - 1; 0 <= ref7 ? af <= ref7 : af >= ref7; j = 0 <= ref7 ? ++af : --af) {
+          newCentroids[j] = null;
+        }
+        for (i = ag = 0, ref8 = n - 1; 0 <= ref8 ? ag <= ref8 : ag >= ref8; i = 0 <= ref8 ? ++ag : --ag) {
+          cluster = assignments[i];
+          if (newCentroids[cluster] === null) {
+            newCentroids[cluster] = values[i];
+          } else {
+            newCentroids[cluster] += values[i];
+          }
+        }
+        for (j = ah = 0, ref9 = num - 1; 0 <= ref9 ? ah <= ref9 : ah >= ref9; j = 0 <= ref9 ? ++ah : --ah) {
+          newCentroids[j] *= 1 / clusterSizes[j];
+        }
+        repeat = false;
+        for (j = ai = 0, ref10 = num - 1; 0 <= ref10 ? ai <= ref10 : ai >= ref10; j = 0 <= ref10 ? ++ai : --ai) {
+          if (newCentroids[j] !== centroids[i]) {
+            repeat = true;
+            break;
+          }
+        }
+        centroids = newCentroids;
+        nb_iters++;
+        if (nb_iters > 200) {
+          repeat = false;
+        }
+      }
+      kClusters = {};
+      for (j = aj = 0, ref11 = num - 1; 0 <= ref11 ? aj <= ref11 : aj >= ref11; j = 0 <= ref11 ? ++aj : --aj) {
+        kClusters[j] = [];
+      }
+      for (i = ak = 0, ref12 = n - 1; 0 <= ref12 ? ak <= ref12 : ak >= ref12; i = 0 <= ref12 ? ++ak : --ak) {
+        cluster = assignments[i];
+        kClusters[cluster].push(values[i]);
+      }
+      tmpKMeansBreaks = [];
+      for (j = al = 0, ref13 = num - 1; 0 <= ref13 ? al <= ref13 : al >= ref13; j = 0 <= ref13 ? ++al : --al) {
+        tmpKMeansBreaks.push(kClusters[j][0]);
+        tmpKMeansBreaks.push(kClusters[j][kClusters[j].length - 1]);
+      }
+      tmpKMeansBreaks = tmpKMeansBreaks.sort(function(a, b) {
+        return a - b;
+      });
+      limits.push(tmpKMeansBreaks[0]);
+      for (i = am = 1, ref14 = tmpKMeansBreaks.length - 1; am <= ref14; i = am += 2) {
+        if (!isNaN(tmpKMeansBreaks[i])) {
+          limits.push(tmpKMeansBreaks[i]);
+        }
+      }
+    }
+    return limits;
+  };
+
+
+  /**
+  	ColorBrewer colors for chroma.js
+  
+  	Copyright (c) 2002 Cynthia Brewer, Mark Harrower, and The 
+  	Pennsylvania State University.
+  
+  	Licensed under the Apache License, Version 2.0 (the "License"); 
+  	you may not use this file except in compliance with the License.
+  	You may obtain a copy of the License at	
+  	http://www.apache.org/licenses/LICENSE-2.0
+  
+  	Unless required by applicable law or agreed to in writing, software distributed
+  	under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR
+  	CONDITIONS OF ANY KIND, either express or implied. See the License for the
+  	specific language governing permissions and limitations under the License.
+  
+      @preserve
+   */
+
+  chroma.brewer = brewer = {
+    OrRd: ['#fff7ec', '#fee8c8', '#fdd49e', '#fdbb84', '#fc8d59', '#ef6548', '#d7301f', '#b30000', '#7f0000'],
+    PuBu: ['#fff7fb', '#ece7f2', '#d0d1e6', '#a6bddb', '#74a9cf', '#3690c0', '#0570b0', '#045a8d', '#023858'],
+    BuPu: ['#f7fcfd', '#e0ecf4', '#bfd3e6', '#9ebcda', '#8c96c6', '#8c6bb1', '#88419d', '#810f7c', '#4d004b'],
+    Oranges: ['#fff5eb', '#fee6ce', '#fdd0a2', '#fdae6b', '#fd8d3c', '#f16913', '#d94801', '#a63603', '#7f2704'],
+    BuGn: ['#f7fcfd', '#e5f5f9', '#ccece6', '#99d8c9', '#66c2a4', '#41ae76', '#238b45', '#006d2c', '#00441b'],
+    YlOrBr: ['#ffffe5', '#fff7bc', '#fee391', '#fec44f', '#fe9929', '#ec7014', '#cc4c02', '#993404', '#662506'],
+    YlGn: ['#ffffe5', '#f7fcb9', '#d9f0a3', '#addd8e', '#78c679', '#41ab5d', '#238443', '#006837', '#004529'],
+    Reds: ['#fff5f0', '#fee0d2', '#fcbba1', '#fc9272', '#fb6a4a', '#ef3b2c', '#cb181d', '#a50f15', '#67000d'],
+    RdPu: ['#fff7f3', '#fde0dd', '#fcc5c0', '#fa9fb5', '#f768a1', '#dd3497', '#ae017e', '#7a0177', '#49006a'],
+    Greens: ['#f7fcf5', '#e5f5e0', '#c7e9c0', '#a1d99b', '#74c476', '#41ab5d', '#238b45', '#006d2c', '#00441b'],
+    YlGnBu: ['#ffffd9', '#edf8b1', '#c7e9b4', '#7fcdbb', '#41b6c4', '#1d91c0', '#225ea8', '#253494', '#081d58'],
+    Purples: ['#fcfbfd', '#efedf5', '#dadaeb', '#bcbddc', '#9e9ac8', '#807dba', '#6a51a3', '#54278f', '#3f007d'],
+    GnBu: ['#f7fcf0', '#e0f3db', '#ccebc5', '#a8ddb5', '#7bccc4', '#4eb3d3', '#2b8cbe', '#0868ac', '#084081'],
+    Greys: ['#ffffff', '#f0f0f0', '#d9d9d9', '#bdbdbd', '#969696', '#737373', '#525252', '#252525', '#000000'],
+    YlOrRd: ['#ffffcc', '#ffeda0', '#fed976', '#feb24c', '#fd8d3c', '#fc4e2a', '#e31a1c', '#bd0026', '#800026'],
+    PuRd: ['#f7f4f9', '#e7e1ef', '#d4b9da', '#c994c7', '#df65b0', '#e7298a', '#ce1256', '#980043', '#67001f'],
+    Blues: ['#f7fbff', '#deebf7', '#c6dbef', '#9ecae1', '#6baed6', '#4292c6', '#2171b5', '#08519c', '#08306b'],
+    PuBuGn: ['#fff7fb', '#ece2f0', '#d0d1e6', '#a6bddb', '#67a9cf', '#3690c0', '#02818a', '#016c59', '#014636'],
+    Spectral: ['#9e0142', '#d53e4f', '#f46d43', '#fdae61', '#fee08b', '#ffffbf', '#e6f598', '#abdda4', '#66c2a5', '#3288bd', '#5e4fa2'],
+    RdYlGn: ['#a50026', '#d73027', '#f46d43', '#fdae61', '#fee08b', '#ffffbf', '#d9ef8b', '#a6d96a', '#66bd63', '#1a9850', '#006837'],
+    RdBu: ['#67001f', '#b2182b', '#d6604d', '#f4a582', '#fddbc7', '#f7f7f7', '#d1e5f0', '#92c5de', '#4393c3', '#2166ac', '#053061'],
+    PiYG: ['#8e0152', '#c51b7d', '#de77ae', '#f1b6da', '#fde0ef', '#f7f7f7', '#e6f5d0', '#b8e186', '#7fbc41', '#4d9221', '#276419'],
+    PRGn: ['#40004b', '#762a83', '#9970ab', '#c2a5cf', '#e7d4e8', '#f7f7f7', '#d9f0d3', '#a6dba0', '#5aae61', '#1b7837', '#00441b'],
+    RdYlBu: ['#a50026', '#d73027', '#f46d43', '#fdae61', '#fee090', '#ffffbf', '#e0f3f8', '#abd9e9', '#74add1', '#4575b4', '#313695'],
+    BrBG: ['#543005', '#8c510a', '#bf812d', '#dfc27d', '#f6e8c3', '#f5f5f5', '#c7eae5', '#80cdc1', '#35978f', '#01665e', '#003c30'],
+    RdGy: ['#67001f', '#b2182b', '#d6604d', '#f4a582', '#fddbc7', '#ffffff', '#e0e0e0', '#bababa', '#878787', '#4d4d4d', '#1a1a1a'],
+    PuOr: ['#7f3b08', '#b35806', '#e08214', '#fdb863', '#fee0b6', '#f7f7f7', '#d8daeb', '#b2abd2', '#8073ac', '#542788', '#2d004b'],
+    Set2: ['#66c2a5', '#fc8d62', '#8da0cb', '#e78ac3', '#a6d854', '#ffd92f', '#e5c494', '#b3b3b3'],
+    Accent: ['#7fc97f', '#beaed4', '#fdc086', '#ffff99', '#386cb0', '#f0027f', '#bf5b17', '#666666'],
+    Set1: ['#e41a1c', '#377eb8', '#4daf4a', '#984ea3', '#ff7f00', '#ffff33', '#a65628', '#f781bf', '#999999'],
+    Set3: ['#8dd3c7', '#ffffb3', '#bebada', '#fb8072', '#80b1d3', '#fdb462', '#b3de69', '#fccde5', '#d9d9d9', '#bc80bd', '#ccebc5', '#ffed6f'],
+    Dark2: ['#1b9e77', '#d95f02', '#7570b3', '#e7298a', '#66a61e', '#e6ab02', '#a6761d', '#666666'],
+    Paired: ['#a6cee3', '#1f78b4', '#b2df8a', '#33a02c', '#fb9a99', '#e31a1c', '#fdbf6f', '#ff7f00', '#cab2d6', '#6a3d9a', '#ffff99', '#b15928'],
+    Pastel2: ['#b3e2cd', '#fdcdac', '#cbd5e8', '#f4cae4', '#e6f5c9', '#fff2ae', '#f1e2cc', '#cccccc'],
+    Pastel1: ['#fbb4ae', '#b3cde3', '#ccebc5', '#decbe4', '#fed9a6', '#ffffcc', '#e5d8bd', '#fddaec', '#f2f2f2']
+  };
+
+
+  /**
+  	X11 color names
+  
+  	http://www.w3.org/TR/css3-color/#svg-color
+   */
+
+  chroma.colors = colors = {
+    indigo: "#4b0082",
+    gold: "#ffd700",
+    hotpink: "#ff69b4",
+    firebrick: "#b22222",
+    indianred: "#cd5c5c",
+    yellow: "#ffff00",
+    mistyrose: "#ffe4e1",
+    darkolivegreen: "#556b2f",
+    olive: "#808000",
+    darkseagreen: "#8fbc8f",
+    pink: "#ffc0cb",
+    tomato: "#ff6347",
+    lightcoral: "#f08080",
+    orangered: "#ff4500",
+    navajowhite: "#ffdead",
+    lime: "#00ff00",
+    palegreen: "#98fb98",
+    darkslategrey: "#2f4f4f",
+    greenyellow: "#adff2f",
+    burlywood: "#deb887",
+    seashell: "#fff5ee",
+    mediumspringgreen: "#00fa9a",
+    fuchsia: "#ff00ff",
+    papayawhip: "#ffefd5",
+    blanchedalmond: "#ffebcd",
+    chartreuse: "#7fff00",
+    dimgray: "#696969",
+    black: "#000000",
+    peachpuff: "#ffdab9",
+    springgreen: "#00ff7f",
+    aquamarine: "#7fffd4",
+    white: "#ffffff",
+    orange: "#ffa500",
+    lightsalmon: "#ffa07a",
+    darkslategray: "#2f4f4f",
+    brown: "#a52a2a",
+    ivory: "#fffff0",
+    dodgerblue: "#1e90ff",
+    peru: "#cd853f",
+    lawngreen: "#7cfc00",
+    chocolate: "#d2691e",
+    crimson: "#dc143c",
+    forestgreen: "#228b22",
+    darkgrey: "#a9a9a9",
+    lightseagreen: "#20b2aa",
+    cyan: "#00ffff",
+    mintcream: "#f5fffa",
+    silver: "#c0c0c0",
+    antiquewhite: "#faebd7",
+    mediumorchid: "#ba55d3",
+    skyblue: "#87ceeb",
+    gray: "#808080",
+    darkturquoise: "#00ced1",
+    goldenrod: "#daa520",
+    darkgreen: "#006400",
+    floralwhite: "#fffaf0",
+    darkviolet: "#9400d3",
+    darkgray: "#a9a9a9",
+    moccasin: "#ffe4b5",
+    saddlebrown: "#8b4513",
+    grey: "#808080",
+    darkslateblue: "#483d8b",
+    lightskyblue: "#87cefa",
+    lightpink: "#ffb6c1",
+    mediumvioletred: "#c71585",
+    slategrey: "#708090",
+    red: "#ff0000",
+    deeppink: "#ff1493",
+    limegreen: "#32cd32",
+    darkmagenta: "#8b008b",
+    palegoldenrod: "#eee8aa",
+    plum: "#dda0dd",
+    turquoise: "#40e0d0",
+    lightgrey: "#d3d3d3",
+    lightgoldenrodyellow: "#fafad2",
+    darkgoldenrod: "#b8860b",
+    lavender: "#e6e6fa",
+    maroon: "#800000",
+    yellowgreen: "#9acd32",
+    sandybrown: "#f4a460",
+    thistle: "#d8bfd8",
+    violet: "#ee82ee",
+    navy: "#000080",
+    magenta: "#ff00ff",
+    dimgrey: "#696969",
+    tan: "#d2b48c",
+    rosybrown: "#bc8f8f",
+    olivedrab: "#6b8e23",
+    blue: "#0000ff",
+    lightblue: "#add8e6",
+    ghostwhite: "#f8f8ff",
+    honeydew: "#f0fff0",
+    cornflowerblue: "#6495ed",
+    slateblue: "#6a5acd",
+    linen: "#faf0e6",
+    darkblue: "#00008b",
+    powderblue: "#b0e0e6",
+    seagreen: "#2e8b57",
+    darkkhaki: "#bdb76b",
+    snow: "#fffafa",
+    sienna: "#a0522d",
+    mediumblue: "#0000cd",
+    royalblue: "#4169e1",
+    lightcyan: "#e0ffff",
+    green: "#008000",
+    mediumpurple: "#9370db",
+    midnightblue: "#191970",
+    cornsilk: "#fff8dc",
+    paleturquoise: "#afeeee",
+    bisque: "#ffe4c4",
+    slategray: "#708090",
+    darkcyan: "#008b8b",
+    khaki: "#f0e68c",
+    wheat: "#f5deb3",
+    teal: "#008080",
+    darkorchid: "#9932cc",
+    deepskyblue: "#00bfff",
+    salmon: "#fa8072",
+    darkred: "#8b0000",
+    steelblue: "#4682b4",
+    palevioletred: "#db7093",
+    lightslategray: "#778899",
+    aliceblue: "#f0f8ff",
+    lightslategrey: "#778899",
+    lightgreen: "#90ee90",
+    orchid: "#da70d6",
+    gainsboro: "#dcdcdc",
+    mediumseagreen: "#3cb371",
+    lightgray: "#d3d3d3",
+    mediumturquoise: "#48d1cc",
+    lemonchiffon: "#fffacd",
+    cadetblue: "#5f9ea0",
+    lightyellow: "#ffffe0",
+    lavenderblush: "#fff0f5",
+    coral: "#ff7f50",
+    purple: "#800080",
+    aqua: "#00ffff",
+    whitesmoke: "#f5f5f5",
+    mediumslateblue: "#7b68ee",
+    darkorange: "#ff8c00",
+    mediumaquamarine: "#66cdaa",
+    darksalmon: "#e9967a",
+    beige: "#f5f5dc",
+    blueviolet: "#8a2be2",
+    azure: "#f0ffff",
+    lightsteelblue: "#b0c4de",
+    oldlace: "#fdf5e6",
+    rebeccapurple: "#663399"
+  };
+
+
+  /*
+      chroma.js
+  
+      Copyright (c) 2011-2013, Gregor Aisch
+      All rights reserved.
+  
+      Redistribution and use in source and binary forms, with or without
+      modification, are permitted provided that the following conditions are met:
+  
+      * Redistributions of source code must retain the above copyright notice, this
+        list of conditions and the following disclaimer.
+  
+      * Redistributions in binary form must reproduce the above copyright notice,
+        this list of conditions and the following disclaimer in the documentation
+        and/or other materials provided with the distribution.
+  
+      * The name Gregor Aisch may not be used to endorse or promote products
+        derived from this software without specific prior written permission.
+  
+      THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+      AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+      IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+      DISCLAIMED. IN NO EVENT SHALL GREGOR AISCH OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
+      INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+      BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+      DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
+      OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
+      NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
+      EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+  
+      @source: https://github.com/gka/chroma.js
+   */
+
+  type = (function() {
+
+    /*
+    for browser-safe type checking+
+    ported from jQuery's $.type
+     */
+    var classToType, len, name, o, ref;
+    classToType = {};
+    ref = "Boolean Number String Function Array Date RegExp Undefined Null".split(" ");
+    for (o = 0, len = ref.length; o < len; o++) {
+      name = ref[o];
+      classToType["[object " + name + "]"] = name.toLowerCase();
+    }
+    return function(obj) {
+      var strType;
+      strType = Object.prototype.toString.call(obj);
+      return classToType[strType] || "object";
+    };
+  })();
+
+  limit = function(x, min, max) {
+    if (min == null) {
+      min = 0;
+    }
+    if (max == null) {
+      max = 1;
+    }
+    if (x < min) {
+      x = min;
+    }
+    if (x > max) {
+      x = max;
+    }
+    return x;
+  };
+
+  unpack = function(args) {
+    if (args.length >= 3) {
+      return args;
+    } else {
+      return args[0];
+    }
+  };
+
+  TWOPI = Math.PI * 2;
+
+  PITHIRD = Math.PI / 3;
+
+  round = Math.round, cos = Math.cos, floor = Math.floor, pow = Math.pow, log = Math.log, sin = Math.sin;
+
+
+  /*
+  interpolates between a set of colors uzing a bezier spline
+   */
+
+  bezier = function(colors) {
+    var I, I0, I1, c, lab0, lab1, lab2, lab3, ref, ref1, ref2;
+    colors = (function() {
+      var len, o, results;
+      results = [];
+      for (o = 0, len = colors.length; o < len; o++) {
+        c = colors[o];
+        results.push(chroma(c));
+      }
+      return results;
+    })();
+    if (colors.length === 2) {
+      ref = (function() {
+        var len, o, results;
+        results = [];
+        for (o = 0, len = colors.length; o < len; o++) {
+          c = colors[o];
+          results.push(c.lab());
+        }
+        return results;
+      })(), lab0 = ref[0], lab1 = ref[1];
+      I = function(t) {
+        var i, lab;
+        lab = (function() {
+          var o, results;
+          results = [];
+          for (i = o = 0; o <= 2; i = ++o) {
+            results.push(lab0[i] + t * (lab1[i] - lab0[i]));
+          }
+          return results;
+        })();
+        return chroma.lab.apply(chroma, lab);
+      };
+    } else if (colors.length === 3) {
+      ref1 = (function() {
+        var len, o, results;
+        results = [];
+        for (o = 0, len = colors.length; o < len; o++) {
+          c = colors[o];
+          results.push(c.lab());
+        }
+        return results;
+      })(), lab0 = ref1[0], lab1 = ref1[1], lab2 = ref1[2];
+      I = function(t) {
+        var i, lab;
+        lab = (function() {
+          var o, results;
+          results = [];
+          for (i = o = 0; o <= 2; i = ++o) {
+            results.push((1 - t) * (1 - t) * lab0[i] + 2 * (1 - t) * t * lab1[i] + t * t * lab2[i]);
+          }
+          return results;
+        })();
+        return chroma.lab.apply(chroma, lab);
+      };
+    } else if (colors.length === 4) {
+      ref2 = (function() {
+        var len, o, results;
+        results = [];
+        for (o = 0, len = colors.length; o < len; o++) {
+          c = colors[o];
+          results.push(c.lab());
+        }
+        return results;
+      })(), lab0 = ref2[0], lab1 = ref2[1], lab2 = ref2[2], lab3 = ref2[3];
+      I = function(t) {
+        var i, lab;
+        lab = (function() {
+          var o, results;
+          results = [];
+          for (i = o = 0; o <= 2; i = ++o) {
+            results.push((1 - t) * (1 - t) * (1 - t) * lab0[i] + 3 * (1 - t) * (1 - t) * t * lab1[i] + 3 * (1 - t) * t * t * lab2[i] + t * t * t * lab3[i]);
+          }
+          return results;
+        })();
+        return chroma.lab.apply(chroma, lab);
+      };
+    } else if (colors.length === 5) {
+      I0 = bezier(colors.slice(0, 3));
+      I1 = bezier(colors.slice(2, 5));
+      I = function(t) {
+        if (t < 0.5) {
+          return I0(t * 2);
+        } else {
+          return I1((t - 0.5) * 2);
+        }
+      };
+    }
+    return I;
+  };
+
+  chroma.interpolate.bezier = bezier;
+
+
+  /*
+  interpolates between a set of colors uzing a bezier spline
+  
+  blend mode formulas taken from:
+  http://www.venture-ware.com/kevin/coding/lets-learn-math-photoshop-blend-modes/
+   */
+
+  blend = function(bottom, top, mode) {
+    if (!blend[mode]) {
+      throw 'unknown blend mode ' + mode;
+    }
+    return blend[mode](bottom, top);
+  };
+
+  blend_f = function(f) {
+    return function(bottom, top) {
+      var c0, c1;
+      c0 = chroma(top).rgb();
+      c1 = chroma(bottom).rgb();
+      return chroma(f(c0, c1), 'rgb');
+    };
+  };
+
+  each = function(f) {
+    return function(c0, c1) {
+      var i, o, out;
+      out = [];
+      for (i = o = 0; o <= 3; i = ++o) {
+        out[i] = f(c0[i], c1[i]);
+      }
+      return out;
+    };
+  };
+
+  normal = function(a, b) {
+    return a;
+  };
+
+  multiply = function(a, b) {
+    return a * b / 255;
+  };
+
+  darken = function(a, b) {
+    if (a > b) {
+      return b;
+    } else {
+      return a;
+    }
+  };
+
+  lighten = function(a, b) {
+    if (a > b) {
+      return a;
+    } else {
+      return b;
+    }
+  };
+
+  screen = function(a, b) {
+    return 255 * (1 - (1 - a / 255) * (1 - b / 255));
+  };
+
+  overlay = function(a, b) {
+    if (b < 128) {
+      return 2 * a * b / 255;
+    } else {
+      return 255 * (1 - 2 * (1 - a / 255) * (1 - b / 255));
+    }
+  };
+
+  burn = function(a, b) {
+    return 255 * (1 - (1 - b / 255) / (a / 255));
+  };
+
+  dodge = function(a, b) {
+    if (a === 255) {
+      return 255;
+    }
+    a = 255 * (b / 255) / (1 - a / 255);
+    if (a > 255) {
+      return 255;
+    } else {
+      return a;
+    }
+  };
+
+  blend.normal = blend_f(each(normal));
+
+  blend.multiply = blend_f(each(multiply));
+
+  blend.screen = blend_f(each(screen));
+
+  blend.overlay = blend_f(each(overlay));
+
+  blend.darken = blend_f(each(darken));
+
+  blend.lighten = blend_f(each(lighten));
+
+  blend.dodge = blend_f(each(dodge));
+
+  blend.burn = blend_f(each(burn));
+
+  chroma.blend = blend;
+
+
+  /*
+      chroma.js
+  
+      Copyright (c) 2011-2013, Gregor Aisch
+      All rights reserved.
+  
+      Redistribution and use in source and binary forms, with or without
+      modification, are permitted provided that the following conditions are met:
+  
+      * Redistributions of source code must retain the above copyright notice, this
+        list of conditions and the following disclaimer.
+  
+      * Redistributions in binary form must reproduce the above copyright notice,
+        this list of conditions and the following disclaimer in the documentation
+        and/or other materials provided with the distribution.
+  
+      * The name Gregor Aisch may not be used to endorse or promote products
+        derived from this software without specific prior written permission.
+  
+      THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+      AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+      IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+      DISCLAIMED. IN NO EVENT SHALL GREGOR AISCH OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
+      INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+      BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+      DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
+      OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
+      NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
+      EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+  
+      @source: https://github.com/gka/chroma.js
+   */
+
+  chroma.cubehelix = function(start, rotations, hue, gamma, lightness) {
+    var dh, dl;
+    if (start == null) {
+      start = 300;
+    }
+    if (rotations == null) {
+      rotations = -1.5;
+    }
+    if (hue == null) {
+      hue = 1;
+    }
+    if (gamma == null) {
+      gamma = 1;
+    }
+    if (lightness == null) {
+      lightness = [0, 1];
+    }
+    dl = lightness[1] - lightness[0];
+    if (type(hue) === 'array') {
+      dh = hue[1] - hue[0];
+      if (dh === 0) {
+        hue = hue[1];
+      }
+    } else {
+      dh = 0;
+    }
+    return function(fract) {
+      var a, amp, b, cos_a, g, h, l, r, sin_a;
+      a = TWOPI * ((start + 120) / 360 + rotations * fract);
+      l = pow(lightness[0] + dl * fract, gamma);
+      h = dh !== 0 ? hue[0] + fract * dh : hue;
+      amp = h * l * (1 - l) / 2;
+      cos_a = cos(a);
+      sin_a = sin(a);
+      r = l + amp * (-0.14861 * cos_a + 1.78277 * sin_a);
+      g = l + amp * (-0.29227 * cos_a - 0.90649 * sin_a);
+      b = l + amp * (+1.97294 * cos_a);
+      return chroma(clip_rgb([r * 255, g * 255, b * 255]));
+    };
+  };
+
+}).call(this);