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stringToColor.js
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75 lines (68 loc) · 1.35 KB
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/* eslint-disable */
function hsvToRgb(h, s, v) {
let r;
let g;
let b;
const i = Math.floor(h * 6);
const f = h * 6 - i;
const p = v * (1 - s);
const q = v * (1 - f * s);
const t = v * (1 - (1 - f) * s);
switch (i % 6) {
case 0:
r = v;
g = t;
b = p;
break;
case 1:
r = q;
g = v;
b = p;
break;
case 2:
r = p;
g = v;
b = t;
break;
case 3:
r = p;
g = q;
b = v;
break;
case 4:
r = t;
g = p;
b = v;
break;
case 5:
r = v;
g = p;
b = q;
break;
}
return {
r: Math.floor(r * 255),
g: Math.floor(g * 255),
b: Math.floor(b * 255),
};
}
/**
* Convert the given string to a unique color.
*
* @param {String} string
* @return {String}
*/
export default function stringToColor(string) {
if (string === '') return '#fff'
let num = 0;
// Convert the username into a number based on the ASCII value of each
// character.
for (let i = 0; i < string.length; i++) {
num += string.charCodeAt(i);
}
// Construct a color using the remainder of that number divided by 360, and
// some predefined saturation and value values.
const hue = num % 360;
const rgb = hsvToRgb(hue / 360, 0.3, 0.9);
return '' + rgb.r.toString(16) + rgb.g.toString(16) + rgb.b.toString(16);
}