Update app.py

app.py

@@ -34,7 +34,7 @@ function refresh() {
     }
 }
 """
-with gr.Blocks(css=css, js = js_func) as demo:
+with gr.Blocks(css=css, js = js_func, theme="monochrome") as demo:
   chatbot = gr.ChatInterface(chat_response)
 
 demo.launch(share=True)