diff --git a/app/css/material-dark.php b/app/css/material-dark.php
index 4b0d2177..27216ffb 100644
--- a/app/css/material-dark.php
+++ b/app/css/material-dark.php
@@ -351,7 +351,7 @@ span.label.label-warning {
 }
 
 [class*="btn"], [class*="btn"]:focus, [class*="btn"]:disabled {
-  background-color: <?php echo $backgroundColor; ?>;
+  background-color: <?php echo $secondaryColor; ?>;
   border-color: transparent;
   border-radius: 18px;
   color: <?php echo $textColor; ?>;