--- a/mercurial/configitems.py	Sun Oct 08 20:26:25 2017 +0200
+++ b/mercurial/configitems.py	Tue Oct 10 10:49:28 2017 +0200
@@ -160,6 +160,10 @@
 coreconfigitem('cmdserver', 'log',
     default=None,
 )
+coreconfigitem('color', '.*',
+    default=None,
+    generic=True,
+)
 coreconfigitem('color', 'mode',
     default='auto',
 )