lib-colors/dist/rgb/helpers/rgb_to_hsl.helper.js

Simple node.js library for work with colors

"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
exports.rgbToHsl = rgbToHsl;
function rgbToHsl(rgb) {
    let { r, g, b, a } = { ...rgb };
    r /= 255;
    g /= 255;
    b /= 255;
    const max = Math.max(r, g, b);
    const min = Math.min(r, g, b);
    let h = 0;
    let s = 0;
    const l = (max + min) / 2;
    if (max === min) {
        h = s = 0;
    }
    else {
        const d = max - min;
        s = l > 0.5 ? d / (2 - max - min) : d / (max + min);
        switch (max) {
            case r:
                h = (g - b) / d + (g < b ? 6 : 0);
                break;
            case g:
                h = (b - r) / d + 2;
                break;
            case b:
                h = (r - g) / d + 4;
                break;
        }
        h = h / 6;
    }
    const hValue = Math.round(h * 360);
    const sValue = Math.round(s * 100);
    const lValue = Math.round(l * 100);
    return {
        h: hValue,
        s: sValue,
        l: lValue,
        a,
    };
}