HSV to Hex

            function fGetRGB($iH, $iS, $iV)
                {

                    if($iH < 0) $iH = 0; // Hue:
                    if($iH > 360) $iH = 360; // 0-360
                    if($iS < 0) $iS = 0; // Saturation:
                    if($iS > 100) $iS = 100; // 0-100
                    if($iV < 0) $iV = 0; // Lightness:
                    if($iV > 100) $iV = 100; // 0-100

                    $dS = $iS/100.0; // Saturation: 0.0-1.0
                    $dV = $iV/100.0; // Lightness: 0.0-1.0
                    $dC = $dV*$dS; // Chroma: 0.0-1.0
                    $dH = $iH/60.0; // H-Prime: 0.0-6.0
                    $dT = $dH; // Temp variable

                    while($dT >= 2.0) $dT -= 2.0; // php modulus does not work with float
                    $dX = $dC*(1-abs($dT-1)); // as used in the Wikipedia link

                    switch($dH) {
                        case($dH >= 0.0 && $dH < 1.0):
                        $dR = $dC; $dG = $dX; $dB = 0.0; break;
                        case($dH >= 1.0 && $dH < 2.0):
                        $dR = $dX; $dG = $dC; $dB = 0.0; break;
                        case($dH >= 2.0 && $dH < 3.0):
                        $dR = 0.0; $dG = $dC; $dB = $dX; break;
                        case($dH >= 3.0 && $dH < 4.0):
                        $dR = 0.0; $dG = $dX; $dB = $dC; break;
                        case($dH >= 4.0 && $dH < 5.0):
                        $dR = $dX; $dG = 0.0; $dB = $dC; break;
                        case($dH >= 5.0 && $dH < 6.0):
                        $dR = $dC; $dG = 0.0; $dB = $dX; break;
                        default:
                        $dR = 0.0; $dG = 0.0; $dB = 0.0; break;
                    }

                    $dM = $dV - $dC;
                    $dR += $dM; $dG += $dM; $dB += $dM;
                    $dR *= 255; $dG *= 255; $dB *= 255;

                    $R=round($dR);
                    $G=round($dG);
                    $B=round($dB);

                    $R=dechex($R);
                    If (strlen($R)<2)
                    $R='0'.$R;

                    $G=dechex($G);
                    If (strlen($G)<2)
                    $G='0'.$G;

                    $B=dechex($B);
                    If (strlen($B)<2)
                    $B='0'.$B;

                    return '#' . $R . $G . $B;
                }