titanscssc::toHSL PHP Method

    public function toHSL($red, $green, $blue)
    {
        $r = $red / 255;
        $g = $green / 255;
        $b = $blue / 255;
        $min = min($r, $g, $b);
        $max = max($r, $g, $b);
        $d = $max - $min;
        $l = ($min + $max) / 2;
        if ($min == $max) {
            $s = $h = 0;
        } else {
            if ($l < 0.5) {
                $s = $d / (2 * $l);
            } else {
                $s = $d / (2 - 2 * $l);
            }
            if ($r == $max) {
                $h = 60 * ($g - $b) / $d;
            } elseif ($g == $max) {
                $h = 60 * ($b - $r) / $d + 120;
            } elseif ($b == $max) {
                $h = 60 * ($r - $g) / $d + 240;
            }
        }
        return array('hsl', fmod($h, 360), $s * 100, $l * 100);
    }