mercurial/templates/static/style-monoblue.css

--- a/mercurial/templates/static/style-monoblue.css	Tue Jan 06 15:21:48 2015 -0800
+++ b/mercurial/templates/static/style-monoblue.css	Tue Jan 06 15:29:02 2015 -0800
@@ -260,6 +260,10 @@
   font-size: 1.2em;
   padding: 3px 0;
 }
+span.difflineplus { color:#008800; }
+span.difflineminus { color:#cc0000; }
+span.difflineat { color:#990099; }
+
 td.source {
   white-space: pre;
   font-family: monospace;