diff --git a/front/src/components/Sidebar.vue b/front/src/components/Sidebar.vue
index 3704dab75..179ffedd7 100644
--- a/front/src/components/Sidebar.vue
+++ b/front/src/components/Sidebar.vue
@@ -241,6 +241,9 @@ $sidebar-color: #3D3E3F;
   }
 }
 
+.ui.message.black {
+  background: $sidebar-color;
+}
 </style>
 
 <style lang="scss">