diff --git a/theme-arc-blue.css b/theme-arc-blue.css
index 44e9cac..0eff72e 100644
--- a/theme-arc-blue.css
+++ b/theme-arc-blue.css
@@ -1113,4 +1113,6 @@
  .mtk14 {
     color: #9a930c;
   }
-  
+  .monaco-editor .minimap-slider, .monaco-editor .minimap-slider .minimap-slider-horizontal {
+    background: #09539d66;
+  }