diff -r 945c9816ec1d -r db63872e10cc mercurial/hgweb/webutil.py
--- a/mercurial/hgweb/webutil.py	Fri Jun 30 03:45:51 2017 +0200
+++ b/mercurial/hgweb/webutil.py	Fri Jun 30 03:45:52 2017 +0200
@@ -406,7 +406,7 @@
     if basectx is None:
         basectx = ctx.p1()
 
-    style = web.config('web', 'style', 'paper')
+    style = web.config('web', 'style')
     if 'style' in req.form:
         style = req.form['style'][0]