public static function darken($color, $percent)
	{
		$rgb = static::getMixedColorAsRgb($color);
		if ($rgb === false) return false;
		if (!static::validatePercent($percent)) return false;

		if (is_array($percent)) {
			foreach ($percent as &$p) $p = abs($p) * -1;
		} else {
			$percent = abs($percent) * -1;
		}

		return static::makeSameAsInput(static::modifyColor($rgb, $percent), $color);
	}