@ant-design/fast-color#

import { FastColor } from '@ant-design/fast-color';

// input
new FastColor('#666'); // short hex
new FastColor('#66ccff'); // hex
new FastColor('#66ccffaa'); // hex with alpha
new FastColor('rgba(102, 204, 255, .5)'); // old css rgb syntax
new FastColor('rgb(102 204 255 / .5)'); // new css rgb syntax
new FastColor('hsl(270, 60, 40, .5)'); // old css hsl syntax, with or without unit
new FastColor('hsl(270deg 60% 40% / 50%)'); // new css hsl syntax, with or without unit
new FastColor({ r: 102, g: 204, b: 255, a: 0.5 }); // rgb object
new FastColor({ h: 270, s: 0.6, l: 0.4, a: 0.5 }); // hsl object
new FastColor({ h: 270, s: 0.6, v: 0.4, a: 0.5 }); // hsv object

// clone
const color = new FastColor('#66ccff');
const color2 = new FastColor(color); // clone via constructor
const color3 = color2.clone(); // call clone method

// output
color.toHexString(); // #66ccff
color.toRgb(); // Object { r: 102, g: 204, b: 255, a: 1 }
color.toRgbString(); // rgb(102,204,255)
color.toHsl(); // Object { h: 200, s: 0.6, l: 0.7, a: 1 }
color.toHslString(); // hsl(200,60%,70%)
color.toHsv(); // Object { h: 200, s: 0.6, v: 1, a: 1 }