diff --git a/res/css/views/rooms/_EventTile.scss b/res/css/views/rooms/_EventTile.scss
index 1c9d8e87d9..47512c3094 100644
--- a/res/css/views/rooms/_EventTile.scss
+++ b/res/css/views/rooms/_EventTile.scss
@@ -510,7 +510,7 @@ $hover-select-border: 4px;
 
 .mx_EventTile:hover .mx_EventTile_body pre,
 .mx_EventTile.focus-visible:focus-within .mx_EventTile_body pre {
-    border: 1px solid #e5e5e5; // deliberate constant as we're behind an invert filter
+    border: 1px solid $tertiary-fg-color; // deliberate constant as we're behind an invert filter
 }
 
 .mx_EventTile_pre_container {