diff --git a/web/app/components/base/chat/chat/question.tsx b/web/app/components/base/chat/chat/question.tsx
index 8fc49d1978..c0cbf0b34f 100644
--- a/web/app/components/base/chat/chat/question.tsx
+++ b/web/app/components/base/chat/chat/question.tsx
@@ -11,7 +11,6 @@ import {
 } from 'react'
 import type { ChatItem } from '../types'
 import type { Theme } from '../embedded-chatbot/theme/theme-context'
-import { CssTransform } from '../embedded-chatbot/theme/utils'
 import ContentSwitch from './content-switch'
 import { User } from '@/app/components/base/icons/src/public/avatar'
 import { Markdown } from '@/app/components/base/markdown'
@@ -117,8 +116,7 @@ const Question: FC<QuestionProps> = ({
         </div>
         <div
           ref={contentRef}
-          className='w-full rounded-2xl bg-[#D1E9FF]/50 px-4 py-3 text-sm text-gray-900'
-          style={theme?.chatBubbleColorStyle ? CssTransform(theme.chatBubbleColorStyle) : {}}
+          className='w-full rounded-2xl bg-chat-bubble-bg px-4 py-3 text-sm text-gray-900'
         >
           {
             !!message_files?.length && (
diff --git a/web/app/components/base/chat/embedded-chatbot/theme/theme-context.ts b/web/app/components/base/chat/embedded-chatbot/theme/theme-context.ts
index d4d617d4b7..b889b21df7 100644
--- a/web/app/components/base/chat/embedded-chatbot/theme/theme-context.ts
+++ b/web/app/components/base/chat/embedded-chatbot/theme/theme-context.ts
@@ -12,7 +12,6 @@ export class Theme {
   public colorPathOnHeader = 'text-text-primary-on-surface'
   public backgroundButtonDefaultColorStyle = 'backgroundColor: #1C64F2'
   public roundedBackgroundColorStyle = 'backgroundColor: rgb(245 248 255)'
-  public chatBubbleColorStyle = 'backgroundColor: rgb(225 239 254)'
   public chatBubbleColor = 'rgb(225 239 254)'
 
   constructor(chatColorTheme: string | null = null, chatColorThemeInverted = false) {
@@ -28,7 +27,6 @@ export class Theme {
       this.backgroundHeaderColorStyle = `backgroundColor: ${this.primaryColor}`
       this.backgroundButtonDefaultColorStyle = `backgroundColor: ${this.primaryColor}; color: ${this.colorFontOnHeaderStyle};`
       this.roundedBackgroundColorStyle = `backgroundColor: ${hexToRGBA(this.primaryColor, 0.05)}`
-      this.chatBubbleColorStyle = `backgroundColor: ${hexToRGBA(this.primaryColor, 0.15)}`
       this.chatBubbleColor = `${hexToRGBA(this.primaryColor, 0.15)}`
     }
   }