diff --git a/trac/htdocs/main.css b/trac/htdocs/main.css
index 609e07e..7abd0fe 100644
--- a/trac/htdocs/main.css
+++ b/trac/htdocs/main.css
@@ -9,6 +9,9 @@ body {
    margin-top: 0;
    margin-bottom: 0;
 }
+#mainnav li { 
+   border-color: #290c00;
+}
 #mainnav :link, #mainnav :visited, #mainnav :link:hover, #mainnav :visited:hover {
    color: #290c00;
 }