--- a/js/flotr2/examples/lib/codemirror/mode/diff/diff.css
+++ b/js/flotr2/examples/lib/codemirror/mode/diff/diff.css
@@ -1,1 +1,4 @@
+span.cm-rangeinfo {color: #a0b;}
+span.cm-minus {color: red;}
+span.cm-plus {color: #2b2;}