diff --git a/src/assets/css/ace-overrides.css b/src/assets/css/ace-overrides.css
index 0be79dc..8500c26 100644
--- a/src/assets/css/ace-overrides.css
+++ b/src/assets/css/ace-overrides.css
@@ -38,6 +38,10 @@
     color: rgba(255, 255, 255, 1.0);
 }
 
+.ace_print-margin {
+    background-color: rgba(255, 0, 0, 0.84) !important;
+}
+
 .ace_selected {
     background: rgba(249, 148, 6, 0.64);
     color: rgba(0, 0, 0, 1.0);