1107 	protected function lib_rgbahex($color)
1122 	protected function lib_argb($color)
1330 	protected function lib_hue($color)
1336 	protected function lib_saturation($color)
1342 	protected function lib_lightness($color)
1451 	protected function lib_luma($color)
1507 	protected function toHSL($color)
1559 	protected function toRGB($color)
2023 	function lib_red($color)
2033 	function lib_green($color)
2043 	function lib_blue($color)
3448 	protected function color(&$out)  function in lessc_parser