titanscssc::lib_saturate PHP Method

    protected function lib_saturate($args)
    {
        $value = $args[0];
        if ($value[0] === 'number') {
            return null;
        }
        $color = $this->assertColor($value);
        $amount = 100 * $this->coercePercent($args[1]);
        return $this->adjustHsl($color, 2, $amount);
    }