diff --git a/css/html_instruct_style.css b/css/html_instruct_style.css
index 4613b380..b98544a1 100644
--- a/css/html_instruct_style.css
+++ b/css/html_instruct_style.css
@@ -61,11 +61,11 @@
 }
 
 .dark .chat .user-message {
-    background: transparent;
+    background: var(--light-gray);
 }
 
 .dark .chat .assistant-message {
-    background: var(--light-gray);
+    background: transparent;
 }
 
 .chat .user-message .text,