diff --git a/docs/static/css/bootstrap-theme.css b/docs/static/css/bootstrap-theme.css
index ab3104057..91f32ffb0 100755
--- a/docs/static/css/bootstrap-theme.css
+++ b/docs/static/css/bootstrap-theme.css
@@ -242,7 +242,7 @@ hr {
   margin-top: 20px;
   margin-bottom: 20px;
   border: 0;
-  border-top: 1px solid #f7f7f7;
+  border-top: 1px solid #e0e0e0;
 }
 p {
   margin: 0 0 10px;