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| 1 | +/** |
| 2 | + * |
| 3 | + * @param {String} color Color in one of the following formats: RGBA or HEX |
| 4 | + */ |
| 5 | + |
| 6 | +/** |
| 7 | + * Map of CSS colors to hex representation |
| 8 | + */ |
| 9 | +const CSSColors = { |
| 10 | + aliceblue: "f0f8ff", |
| 11 | + antiquewhite: "faebd7", |
| 12 | + aqua: "00ffff", |
| 13 | + aquamarine: "7fffd4", |
| 14 | + azure: "f0ffff", |
| 15 | + beige: "f5f5dc", |
| 16 | + bisque: "ffe4c4", |
| 17 | + black: "000000", |
| 18 | + blanchedalmond: "ffebcd", |
| 19 | + blue: "0000ff", |
| 20 | + blueviolet: "8a2be2", |
| 21 | + brown: "a52a2a", |
| 22 | + burlywood: "deb887", |
| 23 | + cadetblue: "5f9ea0", |
| 24 | + chartreuse: "7fff00", |
| 25 | + chocolate: "d2691e", |
| 26 | + coral: "ff7f50", |
| 27 | + cornflowerblue: "6495ed", |
| 28 | + cornsilk: "fff8dc", |
| 29 | + crimson: "dc143c", |
| 30 | + cyan: "00ffff", |
| 31 | + darkblue: "00008b", |
| 32 | + darkcyan: "008b8b", |
| 33 | + darkgoldenrod: "b8860b", |
| 34 | + darkgray: "a9a9a9", |
| 35 | + darkgrey: "a9a9a9", |
| 36 | + darkgreen: "006400", |
| 37 | + darkkhaki: "bdb76b", |
| 38 | + darkmagenta: "8b008b", |
| 39 | + darkolivegreen: "556b2f", |
| 40 | + darkorange: "ff8c00", |
| 41 | + darkorchid: "9932cc", |
| 42 | + darkred: "8b0000", |
| 43 | + darksalmon: "e9967a", |
| 44 | + darkseagreen: "8fbc8f", |
| 45 | + darkslateblue: "483d8b", |
| 46 | + darkslategray: "2f4f4f", |
| 47 | + darkslategrey: "2f4f4f", |
| 48 | + darkturquoise: "00ced1", |
| 49 | + darkviolet: "9400d3", |
| 50 | + deeppink: "ff1493", |
| 51 | + deepskyblue: "00bfff", |
| 52 | + dimgray: "696969", |
| 53 | + dimgrey: "696969", |
| 54 | + dodgerblue: "1e90ff", |
| 55 | + firebrick: "b22222", |
| 56 | + floralwhite: "fffaf0", |
| 57 | + forestgreen: "228b22", |
| 58 | + fuchsia: "ff00ff", |
| 59 | + gainsboro: "dcdcdc", |
| 60 | + ghostwhite: "f8f8ff", |
| 61 | + gold: "ffd700", |
| 62 | + goldenrod: "daa520", |
| 63 | + gray: "808080", |
| 64 | + grey: "808080", |
| 65 | + green: "008000", |
| 66 | + greenyellow: "adff2f", |
| 67 | + honeydew: "f0fff0", |
| 68 | + hotpink: "ff69b4", |
| 69 | + indianred: "cd5c5c", |
| 70 | + indigo: "4b0082", |
| 71 | + ivory: "fffff0", |
| 72 | + khaki: "f0e68c", |
| 73 | + lavender: "e6e6fa", |
| 74 | + lavenderblush: "fff0f5", |
| 75 | + lawngreen: "7cfc00", |
| 76 | + lemonchiffon: "fffacd", |
| 77 | + lightblue: "add8e6", |
| 78 | + lightcoral: "f08080", |
| 79 | + lightcyan: "e0ffff", |
| 80 | + lightgoldenrodyellow: "fafad2", |
| 81 | + lightgray: "d3d3d3", |
| 82 | + lightgrey: "d3d3d3", |
| 83 | + lightgreen: "90ee90", |
| 84 | + lightpink: "ffb6c1", |
| 85 | + lightsalmon: "ffa07a", |
| 86 | + lightseagreen: "20b2aa", |
| 87 | + lightskyblue: "87cefa", |
| 88 | + lightslategray: "778899", |
| 89 | + lightslategrey: "778899", |
| 90 | + lightsteelblue: "b0c4de", |
| 91 | + lightyellow: "ffffe0", |
| 92 | + lime: "00ff00", |
| 93 | + limegreen: "32cd32", |
| 94 | + linen: "faf0e6", |
| 95 | + magenta: "ff00ff", |
| 96 | + maroon: "800000", |
| 97 | + mediumaquamarine: "66cdaa", |
| 98 | + mediumblue: "0000cd", |
| 99 | + mediumorchid: "ba55d3", |
| 100 | + mediumpurple: "9370db", |
| 101 | + mediumseagreen: "3cb371", |
| 102 | + mediumslateblue: "7b68ee", |
| 103 | + mediumspringgreen: "00fa9a", |
| 104 | + mediumturquoise: "48d1cc", |
| 105 | + mediumvioletred: "c71585", |
| 106 | + midnightblue: "191970", |
| 107 | + mintcream: "f5fffa", |
| 108 | + mistyrose: "ffe4e1", |
| 109 | + moccasin: "ffe4b5", |
| 110 | + navajowhite: "ffdead", |
| 111 | + navy: "000080", |
| 112 | + oldlace: "fdf5e6", |
| 113 | + olive: "808000", |
| 114 | + olivedrab: "6b8e23", |
| 115 | + orange: "ffa500", |
| 116 | + orangered: "ff4500", |
| 117 | + orchid: "da70d6", |
| 118 | + palegoldenrod: "eee8aa", |
| 119 | + palegreen: "98fb98", |
| 120 | + paleturquoise: "afeeee", |
| 121 | + palevioletred: "db7093", |
| 122 | + papayawhip: "ffefd5", |
| 123 | + peachpuff: "ffdab9", |
| 124 | + peru: "cd853f", |
| 125 | + pink: "ffc0cb", |
| 126 | + plum: "dda0dd", |
| 127 | + powderblue: "b0e0e6", |
| 128 | + purple: "800080", |
| 129 | + red: "ff0000", |
| 130 | + rosybrown: "bc8f8f", |
| 131 | + royalblue: "4169e1", |
| 132 | + saddlebrown: "8b4513", |
| 133 | + salmon: "fa8072", |
| 134 | + sandybrown: "f4a460", |
| 135 | + seagreen: "2e8b57", |
| 136 | + seashell: "fff5ee", |
| 137 | + sienna: "a0522d", |
| 138 | + silver: "c0c0c0", |
| 139 | + skyblue: "87ceeb", |
| 140 | + slateblue: "6a5acd", |
| 141 | + slategray: "708090", |
| 142 | + slategrey: "708090", |
| 143 | + snow: "fffafa", |
| 144 | + springgreen: "00ff7f", |
| 145 | + steelblue: "4682b4", |
| 146 | + tan: "d2b48c", |
| 147 | + teal: "008080", |
| 148 | + thistle: "d8bfd8", |
| 149 | + tomato: "ff6347", |
| 150 | + turquoise: "40e0d0", |
| 151 | + violet: "ee82ee", |
| 152 | + wheat: "f5deb3", |
| 153 | + white: "ffffff", |
| 154 | + whitesmoke: "f5f5f5", |
| 155 | + yellow: "ffff00", |
| 156 | + yellowgreen: "9acd32", |
| 157 | + transparent: "00000000", |
| 158 | +}; |
| 159 | + |
| 160 | +const getRGBColor = color => { |
| 161 | + if (color.startsWith("rgba")) { |
| 162 | + return RGBAToRGB(color); |
| 163 | + } |
| 164 | + |
| 165 | + if (color.startsWith("rgb")) { |
| 166 | + return RGBToRGB(color); |
| 167 | + } |
| 168 | + |
| 169 | + // HEX |
| 170 | + if (color.indexOf("#") === 0) { |
| 171 | + // Shorthand Syntax |
| 172 | + if (color.length === 4) { |
| 173 | + color = `${color[1]}${color[1]}${color[2]}${color[2]}${color[3]}${color[3]}`; |
| 174 | + } else { |
| 175 | + color = color.slice(1, color.length); |
| 176 | + } |
| 177 | + } |
| 178 | + |
| 179 | + // Css Color |
| 180 | + if (Object.keys(CSSColors).includes(color)) { |
| 181 | + color = CSSColors[color]; |
| 182 | + } |
| 183 | + |
| 184 | + return HEXToRGB(color); |
| 185 | +}; |
| 186 | + |
| 187 | +/** |
| 188 | + * Return an object with the properties for each of the main colors(red, green, blue) |
| 189 | + * @param {String} color Receives a color in the following format: "rgba(0, 0, 0, 1) |
| 190 | + */ |
| 191 | +const RGBAToRGB = color => { |
| 192 | + const openingBracketIndex = color.indexOf("("), |
| 193 | + commasIndexes = []; |
| 194 | + |
| 195 | + for (let i = 0; i < color.length; i++) { |
| 196 | + if (color[i] === ",") { |
| 197 | + commasIndexes.push(i); |
| 198 | + } |
| 199 | + } |
| 200 | + |
| 201 | + return { |
| 202 | + r: parseInt(color.slice(openingBracketIndex + 1, commasIndexes[0]).trim()), |
| 203 | + g: parseInt(color.slice(commasIndexes[0] + 1, commasIndexes[1]).trim()), |
| 204 | + b: parseInt(color.slice(commasIndexes[1] + 1, commasIndexes[2]).trim()), |
| 205 | + }; |
| 206 | +}; |
| 207 | + |
| 208 | +/** |
| 209 | + * Return an object with the properties for each of the main colors(red, green, blue) |
| 210 | + * @param {String} color Receives a color in the following format: "rgb(0, 0, 0) |
| 211 | + */ |
| 212 | +const RGBToRGB = color => { |
| 213 | + const openingBracketIndex = color.indexOf("("), |
| 214 | + closingBraketIndex = color.indexOf(")"), |
| 215 | + commasIndexes = []; |
| 216 | + |
| 217 | + for (let i = 0; i < color.length; i++) { |
| 218 | + if (color[i] === ",") { |
| 219 | + commasIndexes.push(i); |
| 220 | + } |
| 221 | + } |
| 222 | + |
| 223 | + return { |
| 224 | + r: parseInt(color.slice(openingBracketIndex + 1, commasIndexes[0]).trim()), |
| 225 | + g: parseInt(color.slice(commasIndexes[0] + 1, commasIndexes[1]).trim()), |
| 226 | + b: parseInt(color.slice(commasIndexes[1] + 1, closingBraketIndex).trim()), |
| 227 | + }; |
| 228 | +}; |
| 229 | + |
| 230 | +const HSLToRGB = (color = { |
| 231 | + h: undefined, |
| 232 | + s: undefined, |
| 233 | + l: undefined, |
| 234 | +}) => { |
| 235 | + // Formula taken from https://www.rapidtables.com/convert/color/hsl-to-rgb.html |
| 236 | + const C = (1 - Math.abs((2 * color.l) - 1)) * color.s, |
| 237 | + X = C * (1 - Math.abs(((color.h / 60) % 2) - 1)), |
| 238 | + m = color.l - C / 2; |
| 239 | + |
| 240 | + let tempColor = {}; |
| 241 | + switch (Math.round(color.h / 60)) { |
| 242 | + // 0 ≤ H < 60 |
| 243 | + case 0: |
| 244 | + tempColor = { |
| 245 | + r: C, |
| 246 | + g: X, |
| 247 | + b: 0, |
| 248 | + }; |
| 249 | + break; |
| 250 | + |
| 251 | + // 60 ≤ H < 120 |
| 252 | + case 1: |
| 253 | + tempColor = { |
| 254 | + r: X, |
| 255 | + g: C, |
| 256 | + b: 0, |
| 257 | + }; |
| 258 | + break; |
| 259 | + |
| 260 | + // 120 ≤ H < 180 |
| 261 | + case 2: |
| 262 | + tempColor = { |
| 263 | + r: 0, |
| 264 | + g: C, |
| 265 | + b: X, |
| 266 | + }; |
| 267 | + break; |
| 268 | + |
| 269 | + // 180 ≤ H < 240 |
| 270 | + case 3: |
| 271 | + tempColor = { |
| 272 | + r: 0, |
| 273 | + g: X, |
| 274 | + b: C, |
| 275 | + }; |
| 276 | + break; |
| 277 | + |
| 278 | + // 240 ≤ H < 300 |
| 279 | + case 4: |
| 280 | + tempColor = { |
| 281 | + r: X, |
| 282 | + g: 0, |
| 283 | + b: C, |
| 284 | + }; |
| 285 | + break; |
| 286 | + |
| 287 | + // 300 ≤ H < 360 |
| 288 | + default: |
| 289 | + tempColor = { |
| 290 | + r: C, |
| 291 | + g: 0, |
| 292 | + b: X, |
| 293 | + }; |
| 294 | + } |
| 295 | + |
| 296 | + return { |
| 297 | + r: Math.floor((tempColor.r + m) * 255), |
| 298 | + g: Math.floor((tempColor.g + m) * 255), |
| 299 | + b: Math.floor((tempColor.b + m) * 255), |
| 300 | + }; |
| 301 | +}; |
| 302 | + |
| 303 | +const HEXToRGB = hex => { |
| 304 | + // Please make sure you pass a valid 6 digit hex color |
| 305 | + // In the implementation of this method we assume that the hex argument is a 6 digit valid hex color |
| 306 | + |
| 307 | + const rgbValues = { |
| 308 | + r: hex.substr(0, 2), |
| 309 | + g: hex.substr(2, 2), |
| 310 | + b: hex.substr(4, 2), |
| 311 | + }; |
| 312 | + |
| 313 | + const rgbKeys = Object.keys(rgbValues); |
| 314 | + |
| 315 | + rgbKeys.forEach(key => { |
| 316 | + rgbValues[key] = parseInt(rgbValues[key], 16); |
| 317 | + }); |
| 318 | + |
| 319 | + return rgbValues; |
| 320 | +}; |
| 321 | + |
| 322 | +const RGBToHSL = (color = { |
| 323 | + r: undefined, |
| 324 | + g: undefined, |
| 325 | + b: undefined, |
| 326 | +}) => { |
| 327 | + const R = color.r / 255, |
| 328 | + G = color.g / 255, |
| 329 | + B = color.b / 255, |
| 330 | + max = Math.max(R, G, B), |
| 331 | + min = Math.min(R, G, B), |
| 332 | + delta = max - min; |
| 333 | + |
| 334 | + let h, |
| 335 | + s; |
| 336 | + |
| 337 | + // Hue calculation |
| 338 | + if (delta === 0) { |
| 339 | + h = 0; |
| 340 | + } else if (max === R) { |
| 341 | + h = 60 * (((G - B) / delta) % 6); |
| 342 | + } else if (max === G) { |
| 343 | + h = 60 * (((B - R) / delta) + 2); |
| 344 | + } else if (max === B) { |
| 345 | + h = 60 * (((R - G) / delta) + 4); |
| 346 | + } |
| 347 | + |
| 348 | + // Lightness calculation |
| 349 | + const l = (max + min) / 2; |
| 350 | + |
| 351 | + // Saturation calculation |
| 352 | + if (delta === 0) { |
| 353 | + s = 0; |
| 354 | + } else { |
| 355 | + s = delta / (1 - Math.abs(2 * l - 1)); |
| 356 | + } |
| 357 | + |
| 358 | + return { |
| 359 | + h, |
| 360 | + s, |
| 361 | + l, |
| 362 | + }; |
| 363 | +}; |
| 364 | + |
| 365 | +export { |
| 366 | + getRGBColor, |
| 367 | + HSLToRGB, |
| 368 | + HEXToRGB, |
| 369 | + RGBToHSL, |
| 370 | +}; |
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