<?
/*

Function SafeColor(); 

Programmeur    : Frank Schers 
Datum          : 3 september 2002 
Versie         : 1.0 
Beschrijving   : 

*/

function SafeColor($hexcolor) 
{ 
  if(!eregi("^#", $hexcolor)) 
      $hexcolor = "#".$hexcolor; 
  if(eregi("^#[a-f0-9]{6}$", $hexcolor)){ 
      $color[0] = hexdec(substr($hexcolor,1,2)); // red 
      $color[1] = hexdec(substr($hexcolor,3,2)); //green 
      $color[2] = hexdec(substr($hexcolor,5,2)); //blue 

      for($i=0; $i<count($color); $i++) 
      { 
         $mod = $color[$i]%51; 
         if($mod>26) 
            $hex[$i] = str_pad(dechex($color[$i] + (51-$mod)),2,0,STR_PAD_LEFT); 
         else    
            $hex[$i] = str_pad(dechex($color[$i] - $mod),2,0,STR_PAD_LEFT); 
      } 
      $safecolor =  strtoupper("#".$hex[0].$hex[1].$hex[2]); 
      return $safecolor; 
  } 
  else 
  { 
      return $hexcolor; 
  } 
} 
?>