Craft\Imager_ColorService::hex2rgb PHP Method

    static function hex2rgb($hex)
    {
        $hex = str_replace("#", "", $hex);
        if (strlen($hex) == 3) {
            $r = hexdec($hex[0] . $hex[0]);
            $g = hexdec($hex[1] . $hex[1]);
            $b = hexdec($hex[2] . $hex[2]);
        } else {
            $r = hexdec($hex[0] . $hex[1]);
            $g = hexdec($hex[2] . $hex[3]);
            $b = hexdec($hex[4] . $hex[5]);
        }
        return array($r, $g, $b);
    }