=== modified file 'lisp/ChangeLog'
*** lisp/ChangeLog	2013-03-27 16:03:15 +0000
--- lisp/ChangeLog	2013-03-28 14:36:48 +0000
***************
*** 1,3 ****
--- 1,7 ----
+ 2013-03-28  Jambunathan K  <kjambunathan@gmail.com>
+ 
+ 	* color.el (color-hsv-to-rgb): New defun.
+ 
  2013-03-27  Eli Zaretskii  <eliz@gnu.org>
  
  	* facemenu.el (list-colors-callback): New defvar.

=== modified file 'lisp/color.el'
*** lisp/color.el	2013-01-11 15:04:24 +0000
--- lisp/color.el	2013-03-28 14:40:31 +0000
***************
*** 118,123 ****
--- 118,148 ----
    "Return the color that is the complement of COLOR, in hexadecimal format."
    (apply 'color-rgb-to-hex (color-complement color)))
  
+ (defun color-hsv-to-rgb (h s v)
+   "Convert HSV color components to RGB.
+ HUE should be in radians between 0 and 2*`float-pi', inclusive.
+ SATURATION and VALUE should be between 0.0 and 1.0, inclusive.
+ Return a list (RED GREEN BLUE) where each of the components is
+ between 0.0 and 1.0, inclusive."
+   ;; Convert h from radians to degrees
+   (setq h (/ (* 180.0 h) float-pi))
+   (when (>= h 360) (setq h 0.0))
+   (if (zerop s)
+       (list v v v)
+     (let* ((h (/ h 60.0))
+ 	   (i (floor h))
+ 	   (f (- h i))
+ 	   (l (* v (- 1 s)))
+ 	   (m (* v (- 1 (* s f))))
+ 	   (n (* v (- 1 (* s (- 1 f))))))
+       (cond
+        ((= i 0) (list v n l))
+        ((= i 1) (list m v l))
+        ((= i 2) (list l v n))
+        ((= i 3) (list l m v))
+        ((= i 4) (list n l v))
+        ((= i 5) (list v l m))))))
+ 
  (defun color-rgb-to-hsv (red green blue)
    "Convert RGB color components to HSV.
  RED, GREEN, and BLUE should each be numbers between 0.0 and 1.0,