;(function () {
  'use strict';

  let Color = {
    ALICEBLUE: [240, 248, 255],
    ANTIQUEWHITE: [250, 235, 215],
    AQUA: [0, 255, 255],
    AQUAMARINE: [127, 255, 212],
    AZURE: [240, 255, 255],
    BEIGE: [245, 245, 220],
    BISQUE: [255, 228, 196],
    BLACK: [0, 0, 0],
    BLANCHEDALMOND: [255, 235, 205],
    BLUE: [0, 0, 255],
    BLUEVIOLET: [138, 43, 226],
    BROWN: [165, 42, 42],
    BURLYWOOD: [222, 184, 135],
    CADETBLUE: [95, 158, 160],
    CHARTREUSE: [127, 255, 0],
    CHOCOLATE: [210, 105, 30],
    CORAL: [255, 127, 80],
    CORNFLOWERBLUE: [100, 149, 237],
    CORNSILK: [255, 248, 220],
    CRIMSON: [220, 20, 60],
    CYAN: [0, 255, 255],
    DARKBLUE: [0, 0, 139],
    DARKCYAN: [0, 139, 139],
    DARKGOLDENROD: [184, 134, 11],
    DARKGRAY: [169, 169, 169],
    DARKGREEN: [0, 100, 0],
    DARKGREY: [169, 169, 169],
    DARKKHAKI: [189, 183, 107],
    DARKMAGENTA: [139, 0, 139],
    DARKOLIVEGREEN: [85, 107, 47],
    DARKORANGE: [255, 140, 0],
    DARKORCHID: [153, 50, 204],
    DARKRED: [139, 0, 0],
    DARKSALMON: [233, 150, 122],
    DARKSEAGREEN: [143, 188, 143],
    DARKSLATEBLUE: [72, 61, 139],
    DARKSLATEGRAY: [47, 79, 79],
    DARKSLATEGREY: [47, 79, 79],
    DARKTURQUOISE: [0, 206, 209],
    DARKVIOLET: [148, 0, 211],
    DEEPPINK: [255, 20, 147],
    DEEPSKYBLUE: [0, 191, 255],
    DIMGRAY: [105, 105, 105],
    DIMGREY: [105, 105, 105],
    DODGERBLUE: [30, 144, 255],
    FIREBRICK: [178, 34, 34],
    FLORALWHITE: [255, 250, 240],
    FORESTGREEN: [34, 139, 34],
    FUCHSIA: [255, 0, 255],
    GAINSBORO: [220, 220, 220],
    GHOSTWHITE: [248, 248, 255],
    GOLD: [255, 215, 0],
    GOLDENROD: [218, 165, 32],
    GRAY: [128, 128, 128],
    GREEN: [0, 128, 0],
    GREENYELLOW: [173, 255, 47],
    GREY: [128, 128, 128],
    HONEYDEW: [240, 255, 240],
    HOTPINK: [255, 105, 180],
    INDIANRED: [205, 92, 92],
    INDIGO: [75, 0, 130],
    IVORY: [255, 255, 240],
    KHAKI: [240, 230, 140],
    LAVENDER: [230, 230, 250],
    LAVENDERBLUSH: [255, 240, 245],
    LAWNGREEN: [124, 252, 0],
    LEMONCHIFFON: [255, 250, 205],
    LIGHTBLUE: [173, 216, 230],
    LIGHTCORAL: [240, 128, 128],
    LIGHTCYAN: [224, 255, 255],
    LIGHTGOLDENRODYELLOW: [250, 250, 210],
    LIGHTGRAY: [211, 211, 211],
    LIGHTGREEN: [144, 238, 144],
    LIGHTGREY: [211, 211, 211],
    LIGHTPINK: [255, 182, 193],
    LIGHTSALMON: [255, 160, 122],
    LIGHTSEAGREEN: [32, 178, 170],
    LIGHTSKYBLUE: [135, 206, 250],
    LIGHTSLATEGRAY: [119, 136, 153],
    LIGHTSLATEGREY: [119, 136, 153],
    LIGHTSTEELBLUE: [176, 196, 222],
    LIGHTYELLOW: [255, 255, 224],
    LIME: [0, 255, 0],
    LIMEGREEN: [50, 205, 50],
    LINEN: [250, 240, 230],
    MAGENTA: [255, 0, 255],
    MAROON: [128, 0, 0],
    MEDIUMAQUAMARINE: [102, 205, 170],
    MEDIUMBLUE: [0, 0, 205],
    MEDIUMORCHID: [186, 85, 211],
    MEDIUMPURPLE: [147, 112, 219],
    MEDIUMSEAGREEN: [60, 179, 113],
    MEDIUMSLATEBLUE: [123, 104, 238],
    MEDIUMSPRINGGREEN: [0, 250, 154],
    MEDIUMTURQUOISE: [72, 209, 204],
    MEDIUMVIOLETRED: [199, 21, 133],
    MIDNIGHTBLUE: [25, 25, 112],
    MINTCREAM: [245, 255, 250],
    MISTYROSE: [255, 228, 225],
    MOCCASIN: [255, 228, 181],
    NAVAJOWHITE: [255, 222, 173],
    NAVY: [0, 0, 128],
    OLDLACE: [253, 245, 230],
    OLIVE: [128, 128, 0],
    OLIVEDRAB: [107, 142, 35],
    ORANGE: [255, 165, 0],
    ORANGERED: [255, 69, 0],
    ORCHID: [218, 112, 214],
    PALEGOLDENROD: [238, 232, 170],
    PALEGREEN: [152, 251, 152],
    PALETURQUOISE: [175, 238, 238],
    PALEVIOLETRED: [219, 112, 147],
    PAPAYAWHIP: [255, 239, 213],
    PEACHPUFF: [255, 218, 185],
    PERU: [205, 133, 63],
    PINK: [255, 192, 203],
    PLUM: [221, 160, 221],
    POWDERBLUE: [176, 224, 230],
    PURPLE: [128, 0, 128],
    RED: [255, 0, 0],
    ROSYBROWN: [188, 143, 143],
    ROYALBLUE: [65, 105, 225],
    SADDLEBROWN: [139, 69, 19],
    SALMON: [250, 128, 114],
    SANDYBROWN: [244, 164, 96],
    SEAGREEN: [46, 139, 87],
    SEASHELL: [255, 245, 238],
    SIENNA: [160, 82, 45],
    SILVER: [192, 192, 192],
    SKYBLUE: [135, 206, 235],
    SLATEBLUE: [106, 90, 205],
    SLATEGRAY: [112, 128, 144],
    SLATEGREY: [112, 128, 144],
    SNOW: [255, 250, 250],
    SPRINGGREEN: [0, 255, 127],
    STEELBLUE: [70, 130, 180],
    TAN: [210, 180, 140],
    TEAL: [0, 128, 128],
    THISTLE: [216, 191, 216],
    TOMATO: [255, 99, 71],
    TURQUOISE: [64, 224, 208],
    VIOLET: [238, 130, 238],
    WHEAT: [245, 222, 179],
    WHITE: [255, 255, 255],
    WHITESMOKE: [245, 245, 245],
    YELLOW: [255, 255, 0],
    YELLOWGREEN: [154, 205, 50],
  }

  // https://www.w3.org/TR/css3-color/#svg-color
  let colors = {
    aliceblue: 0xF0F8FF,
    antiquewhite: 0xFAEBD7,
    aqua: 0x00FFFF,
    aquamarine: 0x7FFFD4,
    azure: 0xF0FFFF,
    beige: 0xF5F5DC,
    bisque: 0xFFE4C4,
    black: 0x000000,
    blanchedalmond: 0xFFEBCD,
    blue: 0x0000FF,
    blueviolet: 0x8A2BE2,
    brown: 0xA52A2A,
    burlywood: 0xDEB887,
    cadetblue: 0x5F9EA0,
    chartreuse: 0x7FFF00,
    chocolate: 0xD2691E,
    coral: 0xFF7F50,
    cornflowerblue: 0x6495ED,
    cornsilk: 0xFFF8DC,
    crimson: 0xDC143C,
    cyan: 0x00FFFF,
    darkblue: 0x00008B,
    darkcyan: 0x008B8B,
    darkgoldenrod: 0xB8860B,
    darkgray: 0xA9A9A9,
    darkgreen: 0x006400,
    darkgrey: 0xA9A9A9,
    darkkhaki: 0xBDB76B,
    darkmagenta: 0x8B008B,
    darkolivegreen: 0x556B2F,
    darkorange: 0xFF8C00,
    darkorchid: 0x9932CC,
    darkred: 0x8B0000,
    darksalmon: 0xE9967A,
    darkseagreen: 0x8FBC8F,
    darkslateblue: 0x483D8B,
    darkslategray: 0x2F4F4F,
    darkslategrey: 0x2F4F4F,
    darkturquoise: 0x00CED1,
    darkviolet: 0x9400D3,
    deeppink: 0xFF1493,
    deepskyblue: 0x00BFFF,
    dimgray: 0x696969,
    dimgrey: 0x696969,
    dodgerblue: 0x1E90FF,
    firebrick: 0xB22222,
    floralwhite: 0xFFFAF0,
    forestgreen: 0x228B22,
    fuchsia: 0xFF00FF,
    gainsboro: 0xDCDCDC,
    ghostwhite: 0xF8F8FF,
    gold: 0xFFD700,
    goldenrod: 0xDAA520,
    gray: 0x808080,
    green: 0x008000,
    greenyellow: 0xADFF2F,
    grey: 0x808080,
    honeydew: 0xF0FFF0,
    hotpink: 0xFF69B4,
    indianred: 0xCD5C5C,
    indigo: 0x4B0082,
    ivory: 0xFFFFF0,
    khaki: 0xF0E68C,
    lavender: 0xE6E6FA,
    lavenderblush: 0xFFF0F5,
    lawngreen: 0x7CFC00,
    lemonchiffon: 0xFFFACD,
    lightblue: 0xADD8E6,
    lightcoral: 0xF08080,
    lightcyan: 0xE0FFFF,
    lightgoldenrodyellow: 0xFAFAD2,
    lightgray: 0xD3D3D3,
    lightgreen: 0x90EE90,
    lightgrey: 0xD3D3D3,
    lightpink: 0xFFB6C1,
    lightsalmon: 0xFFA07A,
    lightseagreen: 0x20B2AA,
    lightskyblue: 0x87CEFA,
    lightslategray: 0x778899,
    lightslategrey: 0x778899,
    lightsteelblue: 0xB0C4DE,
    lightyellow: 0xFFFFE0,
    lime: 0x00FF00,
    limegreen: 0x32CD32,
    linen: 0xFAF0E6,
    magenta: 0xFF00FF,
    maroon: 0x800000,
    mediumaquamarine: 0x66CDAA,
    mediumblue: 0x0000CD,
    mediumorchid: 0xBA55D3,
    mediumpurple: 0x9370DB,
    mediumseagreen: 0x3CB371,
    mediumslateblue: 0x7B68EE,
    mediumspringgreen: 0x00FA9A,
    mediumturquoise: 0x48D1CC,
    mediumvioletred: 0xC71585,
    midnightblue: 0x191970,
    mintcream: 0xF5FFFA,
    mistyrose: 0xFFE4E1,
    moccasin: 0xFFE4B5,
    navajowhite: 0xFFDEAD,
    navy: 0x000080,
    oldlace: 0xFDF5E6,
    olive: 0x808000,
    olivedrab: 0x6B8E23,
    orange: 0xFFA500,
    orangered: 0xFF4500,
    orchid: 0xDA70D6,
    palegoldenrod: 0xEEE8AA,
    palegreen: 0x98FB98,
    paleturquoise: 0xAFEEEE,
    palevioletred: 0xDB7093,
    papayawhip: 0xFFEFD5,
    peachpuff: 0xFFDAB9,
    peru: 0xCD853F,
    pink: 0xFFC0CB,
    plum: 0xDDA0DD,
    powderblue: 0xB0E0E6,
    purple: 0x800080,
    red: 0xFF0000,
    rosybrown: 0xBC8F8F,
    royalblue: 0x4169E1,
    saddlebrown: 0x8B4513,
    salmon: 0xFA8072,
    sandybrown: 0xF4A460,
    seagreen: 0x2E8B57,
    seashell: 0xFFF5EE,
    sienna: 0xA0522D,
    silver: 0xC0C0C0,
    skyblue: 0x87CEEB,
    slateblue: 0x6A5ACD,
    slategray: 0x708090,
    slategrey: 0x708090,
    snow: 0xFFFAFA,
    springgreen: 0x00FF7F,
    steelblue: 0x4682B4,
    tan: 0xD2B48C,
    teal: 0x008080,
    thistle: 0xD8BFD8,
    tomato: 0xFF6347,
    turquoise: 0x40E0D0,
    violet: 0xEE82EE,
    wheat: 0xF5DEB3,
    white: 0xFFFFFF,
    whitesmoke: 0xF5F5F5,
    yellow: 0xFFFF00,
    yellowgreen: 0x9ACD32
  };

  // function clamp(n, min, max) {
  //   return Math.max(min, Math.min(max, n));
  // }

  function normalizeAngle(angle) {
    while (angle < 0) {
      angle += 360;
    }
    // 360=0
    while (angle >= 360) {
      angle -= 360;
    }
    return angle;
  }

  function rgb2int(rgb) {
    return ((rgb[0] & 255) << 16) | ((rgb[1] & 255) << 8) | (rgb[2] & 255);
  }

  function int2rgb(v) {
    let rgb = new Uint8ClampedArray(3);
    rgb[0] = (v >> 16) & 255;
    rgb[1] = (v >> 8) & 255;
    rgb[2] = v & 255;
    return rgb;
  }

  function rgb2hex(rgb) {
    return '#' + (0x1000000 + rgb2int(rgb)).toString(16).slice(1);
  }

  function hex2rgb(h) {
    h = /^\s*#((?:[0-9A-Fa-f]{3}){1,2})\s*$/.exec(h);
    if (!h) {
      return null;
    }
    h = h[1];
    if (h.length === 3) {
      h = h[0] + h[0] + h[1] + h[1] + h[2] + h[2];
    }
    h = parseInt(h, 16);
    return int2rgb(h);
  }

  //

  function rgb2hsl(rgb) {
    // http://www.rapidtables.com/convert/color/rgb-to-hsl.htm
    let r = rgb[0] / 255;
    let g = rgb[1] / 255;
    let b = rgb[2] / 255;
    let max = Math.max(r, g, b);
    let min = Math.min(r, g, b);
    let d = max - min;
    let h = 0;
    if (d) {
      if (max === r) {
        h = (g - b) / d % 6;
      } else if (max === g) {
        h = (b - r) / d + 2;
      } else {
        h = (r - g) / d + 4;
      }
      h *= 60;
    }
    let l = (max + min) / 2;
    let s = d ? d / (1 - Math.abs(2 * l - 1)) : 0;
    // s *= 100;
    // l *= 100;
    let hsl = new Float64Array(3);
    hsl[0] = h;
    hsl[1] = s;
    hsl[2] = l;
    return hsl;
  }

  function hsl2rgb(hsl) {
    // http://www.rapidtables.com/convert/color/hsl-to-rgb.htm
    let [h, s, l] = hsl;
    h = normalizeAngle(h);
    let c = (1 - Math.abs(2 * l - 1)) * s;
    let x = c * (1 - Math.abs(h / 60 % 2 - 1));
    let m = l - c / 2;
    let r = 0;
    let g = 0;
    let b = 0;
    if (h < 60) {
      r = c;
      g = x;
    } else if (h < 120) {
      r = x;
      g = c;
    } else if (h < 180) {
      g = c;
      b = x;
    } else if (h < 240) {
      g = x;
      b = c;
    } else if (h < 300) {
      r = x;
      b = c;
    } else {
      r = c;
      b = x;
    }
    let rgb = new Uint8ClampedArray(3);
    rgb[0] = (r + m) * 255;
    rgb[1] = (g + m) * 255;
    rgb[2] = (b + m) * 255;
    return rgb;
  }

  function lighter(rgb, factor = 0.5) {
    let ret = new Uint8ClampedArray(3);
    for (let i = 0; i < 3; ++i) {
      ret[i] = rgb[i] + (255 - rgb[i]) * factor;
    }
    return ret;
  }

  function darker(rgb, factor = 0.5) {
    let ret = new Uint8ClampedArray(3);
    for (let i = 0; i < 3; ++i) {
      ret[i] = rgb[i] * (1 - factor);
    }
    return ret;
  }

  // Interpolation
  // http://www.alanzucconi.com/2016/01/06/colour-interpolation/

  function lerp(a, b, t = 0.5) {
    let ret = new Uint8ClampedArray(3);
    for (let i = 0; i < 3; ++i) {
      ret[i] = a[i] + (b[i] - a[i]) * t;
    }
    return ret;
  }

  // https://en.wikipedia.org/wiki/Tints_and_shades

  // Add white
  // with (Color) tints(colors.orange)).forEach(showColor)
  function tints(rgb, n = 5) {
    let [h, s, l] = rgb2hsl(rgb);
    n += 1;
    let step = (1 - l) / n;
    let ret = Array(n);
    ret[0] = new Uint8ClampedArray(rgb);
    for (let i = 1; i < n; ++i) {
      ret[i] = hsl2rgb([h, s, l + step * i]);
    }
    return ret;
  }

  // Add black
  function shades(rgb, n = 5) {
    let [h, s, l] = rgb2hsl(rgb);
    n += 1;
    let step = l / n;
    let ret = Array(n);
    ret[0] = new Uint8ClampedArray(rgb);
    for (let i = 1; i < n; ++i) {
      ret[i] = hsl2rgb([h, s, l - step * i]);
    }
    return ret;
  }

  // Add grey
  function tones(rgb, n = 5) {
    let [h, s, l] = rgb2hsl(rgb);
    n += 1;
    let step = s / n;
    let ret = Array(n);
    ret[0] = new Uint8ClampedArray(rgb);
    for (let i = 1; i < n; ++i) {
      ret[i] = hsl2rgb([h, s - step * i, l]);
    }
    return ret;
  }

  function hueShift(rgb, shift) {
    let hsl = rgb2hsl(rgb);
    hsl[0] += shift;
    return hsl2rgb(hsl);
  }

  function complement(rgb) {
    return hueShift(rgb, 180);
  }

  // Движемся по часовой стрелке
  function triad(rgb, angle = 120) {
    return [
      rgb.slice(),
      hueShift(rgb, angle),
      hueShift(rgb, -angle)
    ];
  }

  function splitComplements(rgb) {
    return triad(rgb, 150);
  }

  function analogous(rgb) {
    return triad(rgb, 30);
  }

  // Double split complementary
  function tetrad(rgb, angle = 90) {
    return [
      rgb.slice(),
      hueShift(rgb, angle),
      complement(rgb),
      hueShift(rgb, 180 + angle)
    ];
  }

  // https://www.w3.org/TR/WCAG20/#relativeluminancedef
  function luminance(rgb) {
    let f = c => c > 0.03928 ? Math.pow((c + 0.055) / 1.055, 2.4) : c / 12.92;
    let r = f(rgb[0] / 255);
    let g = f(rgb[1] / 255);
    let b = f(rgb[2] / 255);
    return 0.2126 * r + 0.7152 * g + 0.0722 * b;
  }

  // http://stackoverflow.com/a/3943023/2240578
  function getTextColor(rgb) {
    return luminance(rgb) > 0.179 ? 'black' : 'white';
  }

  function showColor(rgb) {
    let color = rgb2hex(rgb);
    let textColor = getTextColor(rgb);
    console.log('%c' + color, `background:${color};color:${textColor}`);
  }

  /*
  >>> found=re.findall(r'function\s+(\w+)', s)
   */
  let Color = {
    rgb2int,
    int2rgb,
    rgb2hex,
    hex2rgb,
    name2rgb,
    rgb2hsl,
    hsl2rgb,
    lighter,
    darker,
    lerp,
    tints,
    shades,
    tones,
    hueShift,
    complement,
    triad,
    splitComplements,
    analogous,
    tetrad,
    luminance,
    getTextColor,
    showColor,
  };
  if (typeof module === 'object' && module && module.exports) {
    module.exports = Color;
  } else {
    window.Color = Color;
  }
})();