diff --git a/themes/642854b5-88b4-4c40-b256-e035532109df/chrome.css b/themes/642854b5-88b4-4c40-b256-e035532109df/chrome.css
index cd3fbd2c..90ca64d3 100644
--- a/themes/642854b5-88b4-4c40-b256-e035532109df/chrome.css
+++ b/themes/642854b5-88b4-4c40-b256-e035532109df/chrome.css
@@ -382,3 +382,9 @@ tabpanels .browserStack browser {
   outline: none !important;
   box-shadow: none !important;
 }
+
+/* Sidebar background transparency */
+#sidebar-box {
+  background-color: transparent !important;
+  box-shadow: none !important;
+}