diff --git a/tabs/pid_tuning.css b/tabs/pid_tuning.css
index ab982015..5aab25e2 100644
--- a/tabs/pid_tuning.css
+++ b/tabs/pid_tuning.css
@@ -583,6 +583,7 @@
     border-bottom-left-radius: 3px;
     padding-top: 5px;
     padding-bottom: 5px;
+    background-color: #DEDEDE;
 }