Percentage to Hexcolor in PHP

Question

I\'d like to make a percentage into a hexidecimal color. Kind of how HSV color degrees work...
I am using PHP.

IE: 
  0% : RED       (#FF0000)
  8% : ORANGE          


        

Answer 1

This little snippet would appear to do what you're trying to achieve

http://bytes.com/topic/php/insights/890539-how-produce-first-pair-rgb-hex-color-value-percent-value

function percent2Color($value,$brightness = 255, $max = 100,$min = 0, $thirdColorHex = '00')
{       
    // Calculate first and second color (Inverse relationship)
    $first = (1-($value/$max))*$brightness;
    $second = ($value/$max)*$brightness;

    // Find the influence of the middle color (yellow if 1st and 2nd are red and green)
    $diff = abs($first-$second);    
    $influence = ($brightness-$diff)/2;     
    $first = intval($first + $influence);
    $second = intval($second + $influence);

    // Convert to HEX, format and return
    $firstHex = str_pad(dechex($first),2,0,STR_PAD_LEFT);     
    $secondHex = str_pad(dechex($second),2,0,STR_PAD_LEFT); 

    return $firstHex . $secondHex . $thirdColorHex ; 

    // alternatives:
    // return $thirdColorHex . $firstHex . $secondHex; 
    // return $firstHex . $thirdColorHex . $secondHex;

}