diff -r de1cb83728f8 -r 62b29ca72d1a mercurial/configitems.py
--- a/mercurial/configitems.py	Sat Jul 15 14:14:46 2017 +0200
+++ b/mercurial/configitems.py	Sat Jul 15 14:14:53 2017 +0200
@@ -430,6 +430,9 @@
 coreconfigitem('ui', 'clonebundles',
     default=True,
 )
+coreconfigitem('ui', 'color',
+    default='auto',
+)
 coreconfigitem('ui', 'commitsubrepos',
     default=False,
 )