diff --git a/AppKit/CPColor.j b/AppKit/CPColor.j
index 0be27ab44..3309c2d5c 100644
--- a/AppKit/CPColor.j
+++ b/AppKit/CPColor.j
@@ -736,7 +736,7 @@ var byteToHex = function(n)
     if (!n || isNaN(n))
         return "00";
 
-    n = ROUND(MIN(255, MAX(0, 256 * n)));
+    n = FLOOR(MIN(255, MAX(0, 256 * n)));
 
     return hexCharacters.charAt((n - n % 16) / 16) +
            hexCharacters.charAt(n % 16);