365 lines
11 KiB
HTML
365 lines
11 KiB
HTML
<!DOCTYPE html>
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<head>
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<title>Named Colors Wheel</title>
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<style>
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body {
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font-family: sans-serif;
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text-align: center;
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}
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.swatch {
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display: inline-block;
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min-width: 5em;
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}
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#about-link {
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margin: 1ex;
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position: absolute;
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right: 0;
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text-decoration: none;
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top: 0;
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}
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#about {
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background: white;
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border: 2px solid black;
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display: none;
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color: black;
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left: 0;
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margin: 0 25%;
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padding: 0 1ex;
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position: fixed;
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text-align: left;
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top: 7em;
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}
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#about:target {
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display: block;
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}
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#about .close {
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color: black;
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float: right;
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margin: 1ex 0 1ex 1ex;
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text-decoration: none;
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}
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svg {
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clip-path: circle(300px at center);
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}
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polygon { stroke-width: 1px; }
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.swatch {
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border: 8px outset white;
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border-bottom-color: black;
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border-left-color: gray;
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}
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</style>
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</head>
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<body>
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<svg
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baseProfile="full"
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height="600"
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version="1.1"
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viewbox="0 0 1024 1024"
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width="600"
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xmlns="http://www.w3.org/2000/svg"
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></svg>
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<!-- https://github.com/gorhill/Javascript-Voronoi -->
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<script src="rhill-voronoi-core.min.js"></script>
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<script>
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// Based on https://developer.mozilla.org/en-US/docs/Web/CSS/named-color .
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const colors = {
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// CSS1:
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'black': [0, 0, 0],
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'silver': [192, 192, 192],
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'gray / grey': [128, 128, 128],
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'white': [255, 255, 255],
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'maroon': [128, 0, 0],
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'red': [255, 0, 0],
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'purple': [128, 0, 128],
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'fuchsia / magenta': [255, 0, 255],
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'green': [0, 128, 0],
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'lime': [0, 255, 0],
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'olive': [128, 128, 0],
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'yellow': [255, 255, 0],
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'navy': [0, 0, 128],
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'blue': [0, 0, 255],
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'teal': [0, 128, 128],
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'aqua / cyan': [0, 255, 255],
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'orange': [255, 165, 0],
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'aliceblue': [240, 248, 255],
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'antiquewhite': [250, 235, 215],
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'aquamarine': [127, 255, 212],
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'azure': [240, 255, 255],
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'beige': [245, 245, 220],
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'bisque': [255, 228, 196],
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'blanchedalmond': [255, 235, 205],
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'blueviolet': [138, 43, 226],
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'brown': [165, 42, 42],
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'burlywood': [222, 184, 135],
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'cadetblue': [95, 158, 160],
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'chartreuse': [127, 255, 0],
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'chocolate': [210, 105, 30],
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'coral': [255, 127, 80],
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'cornflowerblue': [100, 149, 237],
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'cornsilk': [255, 248, 220],
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'crimson': [220, 20, 60],
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'darkblue': [0, 0, 139],
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'darkcyan': [0, 139, 139],
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'darkgoldenrod': [184, 134, 11],
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'darkgray / darkgrey': [169, 169, 169],
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'darkgreen': [0, 100, 0],
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'darkkhaki': [189, 183, 107],
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'darkmagenta': [139, 0, 139],
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'darkolivegreen': [85, 107, 47],
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'darkorange': [255, 140, 0],
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'darkorchid': [153, 50, 204],
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'darkred': [139, 0, 0],
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'darksalmon': [233, 150, 122],
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'darkseagreen': [143, 188, 143],
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'darkslateblue': [72, 61, 139],
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'darkslategray / darkslategrey': [47, 79, 79],
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'darkturquoise': [0, 206, 209],
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'darkviolet': [148, 0, 211],
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'deeppink': [255, 20, 147],
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'deepskyblue': [0, 191, 255],
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'dimgray / dimgrey': [105, 105, 105],
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'dodgerblue': [30, 144, 255],
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'firebrick': [178, 34, 34],
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'floralwhite': [255, 250, 240],
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'forestgreen': [34, 139, 34],
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'gainsboro': [220, 220, 220],
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'ghostwhite': [248, 248, 255],
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'gold': [255, 215, 0],
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'goldenrod': [218, 165, 32],
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'greenyellow': [173, 255, 47],
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'honeydew': [240, 255, 240],
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'hotpink': [255, 105, 180],
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'indianred': [205, 92, 92],
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'indigo': [75, 0, 130],
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'ivory': [255, 255, 240],
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'khaki': [240, 230, 140],
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'lavender': [230, 230, 250],
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'lavenderblush': [255, 240, 245],
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'lawngreen': [124, 252, 0],
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'lemonchiffon': [255, 250, 205],
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'lightblue': [173, 216, 230],
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'lightcoral': [240, 128, 128],
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'lightcyan': [224, 255, 255],
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'lightgoldenrodyellow': [250, 250, 210],
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'lightgray / lightgrey': [211, 211, 211],
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'lightgreen': [144, 238, 144],
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'lightpink': [255, 182, 193],
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'lightsalmon': [255, 160, 122],
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'lightseagreen': [32, 178, 170],
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'lightskyblue': [135, 206, 250],
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'lightslategray / lightslategrey': [119, 136, 153],
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'lightsteelblue': [176, 196, 222],
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'lightyellow': [255, 255, 224],
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'limegreen': [50, 205, 50],
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'linen': [250, 240, 230],
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'mediumaquamarine': [102, 205, 170],
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'mediumblue': [0, 0, 205],
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'mediumorchid': [186, 85, 211],
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'mediumpurple': [147, 112, 219],
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'mediumseagreen': [60, 179, 113],
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'mediumslateblue': [123, 104, 238],
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'mediumspringgreen': [0, 250, 154],
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'mediumturquoise': [72, 209, 204],
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'mediumvioletred': [199, 21, 133],
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'midnightblue': [25, 25, 112],
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'mintcream': [245, 255, 250],
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'mistyrose': [255, 228, 225],
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'moccasin': [255, 228, 181],
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'navajowhite': [255, 222, 173],
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'oldlace': [253, 245, 230],
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'olivedrab': [107, 142, 35],
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'orangered': [255, 69, 0],
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'orchid': [218, 112, 214],
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'palegoldenrod': [238, 232, 170],
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'palegreen': [152, 251, 152],
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'paleturquoise': [175, 238, 238],
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'palevioletred': [219, 112, 147],
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'papayawhip': [255, 239, 213],
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'peachpuff': [255, 218, 185],
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'peru': [205, 133, 63],
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'pink': [255, 192, 203],
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'plum': [221, 160, 221],
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'powderblue': [176, 224, 230],
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'rosybrown': [188, 143, 143],
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'royalblue': [65, 105, 225],
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'saddlebrown': [139, 69, 19],
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'salmon': [250, 128, 114],
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'sandybrown': [244, 164, 96],
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'seagreen': [46, 139, 87],
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'seashell': [255, 245, 238],
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'sienna': [160, 82, 45],
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'skyblue': [135, 206, 235],
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'slateblue': [106, 90, 205],
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'slategray / slategrey': [112, 128, 144],
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//'slategrey': [112, 128, 144],
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'snow': [255, 250, 250],
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'springgreen': [0, 255, 127],
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'steelblue': [70, 130, 180],
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'tan': [210, 180, 140],
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'thistle': [216, 191, 216],
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'tomato': [255, 99, 71],
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'turquoise': [64, 224, 208],
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'violet': [238, 130, 238],
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'wheat': [245, 222, 179],
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'whitesmoke': [245, 245, 245],
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'yellowgreen': [154, 205, 50],
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'rebeccapurple': [102, 51, 153],
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};
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// Based on https://stackoverflow.com/a/54070620/91238 .
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// input: r,g,b in [0,1], out: h in [0,360) and s,v in [0,1]
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function rgb2hsv(r,g,b) {
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let v=Math.max(r,g,b), c=v-Math.min(r,g,b);
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let h= c && ((v==r) ? (g-b)/c : ((v==g) ? 2+(b-r)/c : 4+(r-g)/c));
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return [60*(h<0?h+6:h), v&&c/v, v];
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}
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// For the whole color wheel, radius and center x/y.
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const radius = 512;
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const cx = radius;
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const cy = radius;
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const svg = document.querySelector('svg');
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const styleSheet = document.styleSheets[0];
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// TODO: Select-able color categories, re-render wheel.
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function renderWheel() {
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let colorsBySite = {};
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let sites = [];
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Object.entries(colors).forEach(([name, color], _) => {
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let [r, g, b] = color;
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let [h, s, v] = rgb2hsv(r/255, g/255, b/255);
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// Based on https://stackoverflow.com/a/54522007/91238 .
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// I've tweaked it to spread out some of the colors (especially they greys)
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// that don't fit well into a true H/S wheel.
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let colorRadius = (s + v/5)*0.75 * radius;
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let colorAngle = h/360 * 2 * Math.PI;
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let x = Math.cos(colorAngle) * colorRadius + cx;
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let y = Math.sin(colorAngle) * colorRadius + cy;
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sites.push({x: x, y: y});
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colorsBySite[[x, y]] = name;
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});
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let voronoi = new Voronoi().compute(sites, {xl: 0, xr: 1024, yt: 0, yb: 1024});
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voronoi.cells.forEach(cell => {
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if (cell.closeMe) {
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console.warn('cell', cell, 'needs closing');
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return;
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}
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let colorName = colorsBySite[[cell.site.x, cell.site.y]];
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let [r, g, b] = colors[colorName];
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let c = document.createElementNS('http://www.w3.org/2000/svg', 'polygon');
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c.setAttribute('data-color', colorName);
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c.setAttribute('mask', 'url(#circle-mask)');
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let points = '';
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cell.halfedges.forEach(edge => {
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let s = edge.getStartpoint();
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let e = edge.getEndpoint();
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points += `${s.x} ${s.y}, `;
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});
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points = points.replace(/, $/, '');
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c.setAttribute('points', points);
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svg.appendChild(c);
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let rgb = `rgb(${r}, ${g}, ${b})`;
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styleSheet.insertRule(`[data-color='${colorName}'] { fill: ${rgb}; stroke: ${rgb}; }`);
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});
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}
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renderWheel();
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function activateColor(el) {
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renderPreview(el.getAttribute('data-color'));
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// Move the SVG node to the end, so it(s stroke) will draw above all others.
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el.parentNode.appendChild(el);
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// Force its stroke to be black. (Doing this with CSS doesn't work; the
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// hover state is broken by mutating the DOM.)
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el.style.stroke = 'black';
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el.style.strokeWidth = '5px';
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}
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// https://stackoverflow.com/a/5624139/91238
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function componentToHex(c) {
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var hex = c.toString(16);
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return hex.length == 1 ? "0" + hex : hex;
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}
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function rgbToHex(r, g, b) {
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return "#" + componentToHex(r) + componentToHex(g) + componentToHex(b);
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}
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let previewLocked = false;
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function renderPreview(color) {
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if (!color) {
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document.getElementById('preview').innerHTML = '';
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return;
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}
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let [r, g, b] = colors[color];
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document.getElementById('preview').innerHTML = `
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${color}
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<span class="swatch"
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style="background-color: ${rgbToHex(r, g, b)};"> </span>
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${rgbToHex(r, g, b).toUpperCase()}
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`;
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}
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svg.addEventListener('mouseover', e => {
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let el = e.target;
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if (el.tagName != 'polygon') return;
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if (!el.nextElementSibling) return;
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if (!previewLocked) {
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activateColor(el);
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}
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});
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svg.addEventListener('mouseout', e => {
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let el = e.target;
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if (el.tagName != 'polygon') return;
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if (!previewLocked) {
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renderPreview(null);
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// Reset forced stroke from mouseover.
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el.removeAttribute('style');
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}
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});
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document.body.addEventListener('click', e => {
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let el = e.target;
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// Ignore clicks, i.e. to select, in the preview.
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if (document.getElementById('preview').contains(el)) return;
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// Remove possible forced stroke from previously-locked color.
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document.querySelectorAll('polygon[style]').forEach(el => {
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el.removeAttribute('style');
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});
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if (el.tagName != 'polygon') {
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previewLocked = false;
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renderPreview(null);
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return;
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}
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previewLocked = true;
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activateColor(el);
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});
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</script>
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<h1 id="preview"></h1>
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<a id='about-link' href='#about'>❓</a>
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<div id='about'>
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<a class='close' href='#'>❌</a>
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<p>This "color wheel" arrangement is a compact and visual way to represent a whole range of colors. I was reminded of the named/web colors by <a href="https://news.ycombinator.com/item?id=33647207">a recent Hacker News comment thread</a>, and thought again of arranging them into a color wheel.</p>
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<p>So here it is: a color wheel, with only "web colors" on it. Each color is placed on the wheel, then grown to a polygon to fill the wheel with a Voronoi diagram.</p>
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<p>Hover colors to see their name (plus extra preview color swatch and hex code). Click one to "lock" it. The idea is when picking colors for a design, choose visually here from these few (139 distinct) colors, rather than trying to choose from the millions that are actually available. And you can refer to them by name in your CSS!</p>
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<p>The arrangement of the wheel has been tweaked from a pure <a href="https://en.wikipedia.org/wiki/HSL_and_HSV">HSV</a> interpretation, to make sure all names have a distinct location. List of colors from <a href="https://developer.mozilla.org/en-US/docs/Web/CSS/named-color">Mozilla documentation</a>.</p>
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</div>
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