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17 lines
436 B
JavaScript
17 lines
436 B
JavaScript
export default function(hexColor, lightness) {
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let hex = String(hexColor).replace(/[^0-9a-f]/gi, '');
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if (hex.length < 6) {
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hex = hex.replace(/(.)/g, '$1$1');
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}
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let lum = lightness || 0;
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let rgb = '#';
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let c;
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for (let i = 0; i < 3; ++i) {
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c = parseInt(hex.substr(i * 2, 2), 16);
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c = Math.round(Math.min(Math.max(0, c + c * lum), 255)).toString(16);
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rgb += ('00' + c).substr(c.length);
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}
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return rgb;
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}
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