diff --git a/HTML/index.html b/HTML/index.html
index b9e9c1a43..bc2c85816 100644
--- a/HTML/index.html
+++ b/HTML/index.html
@@ -21,3 +21,13 @@
 
 <script src="osx.js" type="text/javascript" charset="utf-8"></script>
 <script src="atomicity.js" type="text/javascript" charset="utf-8"></script>
+
+<style>
+.ace-twilight .ace_gutter {
+  color: #888888;
+}
+
+.ace-twilight .ace_scroller {
+  background: ##1A1A1A;
+}
+</style>
\ No newline at end of file