color.htm

<div id="test"></div>
<script type="text/javascript" charset="utf-8">
function hsb2rgb(hue, sat, bright) { 
  var r, g, b, max = bright*255, min = max*(1-sat), deg = 360*hue; 
  if(deg < 60) g = min + (deg)*(max-min)/60, r = max, b = min; 
  else if(deg < 120) r = max - (deg-60)*(max-min)/60, g = max, b = min; 
  else if(deg < 180) b = min + (deg-120)*(max-min)/60, g = max, r = min; 
  else if(deg < 240) g = max - (deg-180)*(max-min)/60, b = max, r = min; 
  else if(deg < 300) r = min + (deg-240)*(max-min)/60, b = max, g = min; 
  else b = max - (deg-300)*(max-min)/60, r = max, g = min; 
  r=Math.floor(r);
  g=Math.floor(g);
  b=Math.floor(b);
  document.bgColor='#'+r.toString(16)+g.toString(16)+b.toString(16);
  return 'rgb('+ r+','+g+','+b+')'; 
} 
var n=Math.random();
document.getElementById("test").innerHTML=n+"<br />"+hsb2rgb(n,1,1);
</script>