Gradio - Changing background colour in all devices

I am trying to force Gradio to show a white background colour ALL the time in all browsers. My code below works to force white colour on my desktop (using Firefox) but on mobile itโ€™s still showing the typical default Gradio black background. How to change this behaviour to permanently show a white background in all devices? Thank you

demo = gr.Interface(lambda x:x+x, inputs=gr.Textbox(label='Test'), outputs=gr.Textbox(label='test2'),
        css=".gradio-container {background-color: white} ").launch(share=False)

hi, if youโ€™re tying to force dark/light them on Gradio app, you can try this

import gradio as gr

interface = gr.Interface(lambda a: a, "text", "text")

with gr.Blocks() as block:
    interface.render()
    block.load(
        None,
        None,
        _js="""
  () => {
  const params = new URLSearchParams(window.location.search);
  if (!params.has('__theme')) {
    params.set('__theme', 'dark');
    window.location.search = params.toString();
  }
  }""",
    )

block.launch(share=False)