mosbth / Anax-MVC

		return array($color, $delta);

	}

	protected function lib_darken($args) {

		list($color, $delta) = $this->colorArgs($args);

		$hsl = $this->toHSL($color);

		$hsl[3] = $this->clamp($hsl[3] - $delta, 100);

		return $this->toRGB($hsl);

	}

	protected function lib_lighten($args) {

		list($color, $delta) = $this->colorArgs($args);

		return $this->toRGB($hsl);

	}

	protected function lib_lighten($args) {

		list($color, $delta) = $this->colorArgs($args);

		$hsl = $this->toHSL($color);

		$hsl[3] = $this->clamp($hsl[3] + $delta, 100);

		return $this->toRGB($hsl);

	}

	protected function lib_saturate($args) {

		list($color, $delta) = $this->colorArgs($args);

		return $this->toRGB($hsl);

	}

	protected function lib_saturate($args) {

		list($color, $delta) = $this->colorArgs($args);

		$hsl = $this->toHSL($color);

		$hsl[2] = $this->clamp($hsl[2] + $delta, 100);

		return $this->toRGB($hsl);

	}

	protected function lib_desaturate($args) {

		list($color, $delta) = $this->colorArgs($args);

		return $this->toRGB($hsl);

	}

	protected function lib_desaturate($args) {

		list($color, $delta) = $this->colorArgs($args);

		$hsl = $this->toHSL($color);

		$hsl[2] = $this->clamp($hsl[2] - $delta, 100);

		return $this->toRGB($hsl);

	}

	protected function lib_spin($args) {

		list($color, $delta) = $this->colorArgs($args);