diff --git a/css/html_bubble_chat_style.css b/css/html_bubble_chat_style.css
index b9dfe87d..fff10fd0 100644
--- a/css/html_bubble_chat_style.css
+++ b/css/html_bubble_chat_style.css
@@ -39,7 +39,7 @@
 }
 
 .dark .text-bot {
-  background-color: #202c33;
+  background-color: #1f2937;
   color: #111b21;
 }