diff --git a/src/readtheorg_theme/css/readtheorg.css b/src/readtheorg_theme/css/readtheorg.css
index e9c9033..2e47415 100644
--- a/src/readtheorg_theme/css/readtheorg.css
+++ b/src/readtheorg_theme/css/readtheorg.css
@@ -430,7 +430,6 @@ table tr:nth-child(2n) td{
     }
 
     #toggle-sidebar {
-        background-color: #2980B9;
         display: block;
         margin-bottom: 1.6em;
         padding: 0.6em;