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diff --git a/bin/rgb_hsv.php b/bin/rgb_hsv.php
new file mode 100755
index 0000000..d081972
--- /dev/null
+++ b/bin/rgb_hsv.php
@@ -0,0 +1,108 @@
+#!/usr/bin/php
+<?php
+function RGB_to_HSV ($norm, $R, $G, $B)  // RGB Values:Number 0-255
+{                                 // HSV Results:Number 0-1
+   $HSL = array();
+
+   $var_R = ($R / $norm);
+   $var_G = ($G / $norm);
+   $var_B = ($B / $norm);
+
+   $var_Min = min($var_R, $var_G, $var_B);
+   $var_Max = max($var_R, $var_G, $var_B);
+   $del_Max = $var_Max - $var_Min;
+
+   $V = $var_Max;
+
+   if ($del_Max == 0)
+   {
+      $H = 0;
+      $S = 0;
+   }
+   else
+   {
+      $S = $del_Max / $var_Max;
+
+      $del_R = ( ( ( $var_Max - $var_R ) / 6 ) + ( $del_Max / 2 ) ) / $del_Max;
+      $del_G = ( ( ( $var_Max - $var_G ) / 6 ) + ( $del_Max / 2 ) ) / $del_Max;
+      $del_B = ( ( ( $var_Max - $var_B ) / 6 ) + ( $del_Max / 2 ) ) / $del_Max;
+
+      if      ($var_R == $var_Max) $H = $del_B - $del_G;
+      else if ($var_G == $var_Max) $H = ( 1 / 3 ) + $del_R - $del_B;
+      else if ($var_B == $var_Max) $H = ( 2 / 3 ) + $del_G - $del_R;
+
+      if ($H<0) $H++;
+      if ($H>1) $H--;
+   }
+
+   $HSL = array($H * $norm, $S * $norm, $V * $norm);
+
+   return $HSL;
+}
+
+function HSV_to_RGB($norm, $H, $S, $V) {
+    $H /= $norm;
+    $S /= $norm;
+    $V /= $norm;
+    //1
+    $H *= 6;
+    //2
+    $I = floor($H);
+    $F = $H - $I;
+    //3
+    $M = $V * (1 - $S);
+    $N = $V * (1 - $S * $F);
+    $K = $V * (1 - $S * (1 - $F));
+    //4
+    switch ($I) {
+        case 0:
+            list($R,$G,$B) = array($V,$K,$M);
+            break;
+        case 1:
+            list($R,$G,$B) = array($N,$V,$M);
+            break;
+        case 2:
+            list($R,$G,$B) = array($M,$V,$K);
+            break;
+        case 3:
+            list($R,$G,$B) = array($M,$N,$V);
+            break;
+        case 4:
+            list($R,$G,$B) = array($K,$M,$V);
+            break;
+        case 5:
+        case 6: //for when $H=1 is given
+            list($R,$G,$B) = array($V,$M,$N);
+            break;
+    }
+    return array($R * $norm, $G * $norm, $B * $norm);
+}
+
+function main()
+{
+    GLOBAL $argv;
+    
+    if ($argv[1] == "-tohsv" || $argv[1] == "-toxhsv") {
+        $a = RGB_to_HSV($argv[2], $argv[3], $argv[4], $argv[5]);
+        if ($argv[1] == "-tohsv") {
+            printf("%f,%f,%f\n", $a[0], $a[1], $a[2]);
+        }
+        else {
+            printf("%02x%02x%02x\n", (int)$a[0], (int)$a[1], (int)$a[2]);
+        }
+    }
+    
+    if ($argv[1] == "-torgb" || $argv[1] == "-toxrgb") {
+        $a = HSV_to_RGB($argv[2], $argv[3], $argv[4], $argv[5]);
+        if ($argv[1] == "-torgb") {
+            printf("%f,%f,%f\n", $a[0], $a[1], $a[2]);
+        }
+        else {
+            printf("%02x%02x%02x\n", (int)$a[0], (int)$a[1], (int)$a[2]);
+        }
+    }
+}
+
+main();
+
+?>
\ No newline at end of file