diff --git a/stylesheets/components/Avatar.scss b/stylesheets/components/Avatar.scss
index ca0483144c..9f87701309 100644
--- a/stylesheets/components/Avatar.scss
+++ b/stylesheets/components/Avatar.scss
@@ -145,9 +145,13 @@
 
   &--with-story {
     border-radius: 100%;
-    border: 2px solid $color-white-alpha-40;
+    border: 2px solid $color-black-alpha-40;
     padding: 3px;
 
+    @include dark-theme {
+      border-color: $color-white-alpha-40;
+    }
+
     &--unread {
       border-color: $color-ultramarine-dawn;
     }