HSL to RGB color conversion

Question

I am looking for a JavaScript / PHP algorithm to convert between HSL color to RGB.

It seems to me that HSL is not very widely used so I am not having much luck search

Answer 1

PHP - shortest but precise

Here I rewrite my JS answer (math details are there) to PHP - you can run it here

function hsl2rgb($h,$s,$l) 
{
  $a = $s * min($l, 1-$l);
  $k = function($n,$h) { return ($n+$h/30)%12;};
  $f = function($n) use ($h,$s,$l,$a,$k) { 
      return $l - $a * max( min($k($n,$h)-3, 9-$k($n,$h), 1),-1);
  };
  return [ $f(0), $f(8), $f(4) ];
}