*/
static toRGBA(hsla: HSLA): RGBA {
const { s, l, a } = hsla;
let r: number, g: number, b: number;
if (s === 0) {
r = g = b = l; // achromatic
const q = l < 0.5 ? l * (1 + s) : l + s - l * s;
const p = 2 * l - q;