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Title : Colors - Make a hex color lighter
Categories : PHP, Colors Click here to Update Your Picture
Justin French
Date : May 04th 2003
Grade : 4 of 5 (graded 8 times)
Viewed : 11577
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Create a lighter shade of a hex color:

<?
function hexLighter($hex,$factor = 30)
        {
        $new_hex = '';
        
        $base['R'] = hexdec($hex{0}.$hex{1});
        $base['G'] = hexdec($hex{2}.$hex{3});
        $base['B'] = hexdec($hex{4}.$hex{5});
        
        foreach ($base as $k => $v)
                {
                $amount = 255 - $v;
                $amount = $amount / 100;
                $amount = round($amount * $factor);
                $new_decimal = $v + $amount;
        
                $new_hex_component = dechex($new_decimal);
                if(strlen($new_hex_component) < 2)
                        { $new_hex_component = "0".$new_hex_component; }
                $new_hex .= $new_hex_component;
                }
                
        return $new_hex;        
        }
?>

Example, making a new colour 50% lighter than the first:
<?
$myCol = "FFCC99";
$newCol = hexLighter($myCol, 50);
?>



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