diff --git a/app/assets/javascripts/ide/lib/themes/gl_theme.js b/app/assets/javascripts/ide/lib/themes/gl_theme.js
index 2fc96250c7d..439ae50448a 100644
--- a/app/assets/javascripts/ide/lib/themes/gl_theme.js
+++ b/app/assets/javascripts/ide/lib/themes/gl_theme.js
@@ -9,6 +9,7 @@ export default {
       'diffEditor.insertedTextBackground': '#ddfbe6',
       'diffEditor.removedTextBackground': '#f9d7dc',
       'editor.selectionBackground': '#aad6f8',
+      'editorIndentGuide.activeBackground': '#cccccc',
     },
   },
 };