rgb.js

  xy2rgb: function(x,y) {

    var X = x/y;
    var Y = 1;
    var Z = ((1 - x - y)/y);

    X = X / 100.0;
    Y = Y / 100.0;
    Z = Z / 100.0;

    var R = X *  3.2406 + Y * -1.5372 + Z * -0.4986;
    var G = X * -0.9689 + Y *  1.8758 + Z *  0.0415;
    var B = X *  0.0557 + Y * -0.2040 + Z *  1.0570;

    if(R > 0.0031308) {
      R = 1.055 * (Math.pow(R, (1/2.4))) - 0.055
    } else { R = 12.92 * R }
    if(G > 0.0031308) {
      G = 1.055 * (Math.pow(G, (1/2.4))) - 0.055
    } else { G = 12.92 * G }
    if(B > 0.0031308) {
      B = 1.055 * (Math.pow(B, (1/2.4))) - 0.055
    } else { B = 12.92 * B }

    return [R * 255,G * 255,B * 255];
  }

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