Sass: HSB to HSL converter

hsb.scss

// Simple HSB to HSL converter by Alexander Futekov (@futekov)
// http://www.sitepoint.com/hsb-colors-with-sass/
//
@function hsb($h-hsb, $s-hsb, $b-hsb, $a: 1) {
	@if $b-hsb == 0 {
		@return hsla(0, 0, 0, $a)
	} @else {
		$l-hsl: ($b-hsb/2) * (2 - ($s-hsb/100));
		$s-hsl: ($b-hsb * $s-hsb) / if($l-hsl < 50, $l-hsl * 2, 200 - $l-hsl * 2);
		@return hsla($h-hsb, $s-hsl, $l-hsl, $a);
	}
}