hgext/color.py

--- a/hgext/color.py	Thu Dec 22 13:19:12 2016 +0100
+++ b/hgext/color.py	Thu Dec 22 06:18:45 2016 +0100
@@ -297,7 +297,7 @@
     return None
 
 class colorui(uimod.ui):
-    _colormode = 'ansi'
+    _colormode = None
     def write(self, *args, **opts):
         if self._colormode is None:
             return super(colorui, self).write(*args, **opts)