color-transformer-ui/lib/shade-color/index.js

Tools to transform colors with Javascript

"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
exports.default = (color, percent) => {
    if (color.length < 7)
        throw new Error(`[shade-color] color must be formatted "#FFFFFF" not like this "#FFF" - (${color})`);
    if (!color.includes('#'))
        throw new Error(`[shade-color] color must be an HEX - ex: "#FFFFFF" - (${color})`);
    let R = parseInt(color.substring(1, 3), 16);
    let G = parseInt(color.substring(3, 5), 16);
    let B = parseInt(color.substring(5, 7), 16);
    R = parseInt(String((R * (100 + percent)) / 100));
    G = parseInt(String((G * (100 + percent)) / 100));
    B = parseInt(String((B * (100 + percent)) / 100));
    R = R < 255 ? R : 255;
    G = G < 255 ? G : 255;
    B = B < 255 ? B : 255;
    const RR = R.toString(16).length === 1 ? '0' + R.toString(16) : R.toString(16);
    const GG = G.toString(16).length === 1 ? '0' + G.toString(16) : G.toString(16);
    const BB = B.toString(16).length === 1 ? '0' + B.toString(16) : B.toString(16);
    return '#' + RR + GG + BB;
};
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