hex2rgb(hex) {
        const shorthandRegex = /^#?([a-f\d])([a-f\d])([a-f\d])$/i;
        hex = hex.replace(shorthandRegex, (m, r, g, b) => r + r + g + g + b + b);
        const result = /^#?([a-f\d]{2})([a-f\d]{2})([a-f\d]{2})$/i.exec(hex);
        return result
            ? `${parseInt(result[1], 16).toString()},${parseInt(result[2], 16).toString()},${parseInt(result[3], 16).toString()}`
            : null;
    }
Convert an HEX color to RGB