Index: Lib/lib-tk/tkColorChooser.py
===================================================================
--- Lib/lib-tk/tkColorChooser.py	(revision 66193)
+++ Lib/lib-tk/tkColorChooser.py	(working copy)
@@ -43,7 +43,7 @@
     def _fixresult(self, widget, result):
         # to simplify application code, the color chooser returns
         # an RGB tuple together with the Tk color string
-        if not result:
+        if not str(result):
             return None, None # canceled
         r, g, b = widget.winfo_rgb(result)
         return (r/256, g/256, b/256), result