`gr.Textbox`'s background is white when `max_lines=1` in dark mode

[yujincheng08]

Describe the bug

When set gr.Textbox with max_lines=1, the background of the text box is white in dark mode. Without max_lines=1, it show normal gray background

Have you searched existing issues? 🔎

• I have searched and found no existing issues

Reproduction

import gradio as gr
with gr.Blocks() as demo:
    gr.Textbox(max_lines=1, value='Some contents')
    gr.Textbox(value='Other contents')

demo.launch(server_port=8080)

Screenshot

Logs

UI issue, no log.

System Info

Gradio Environment Information:
------------------------------
Operating System: Darwin
gradio version: 6.1.0
gradio_client version: 2.0.1

------------------------------------------------
gradio dependencies in your environment:

aiofiles: 24.1.0
anyio: 4.12.0
audioop-lts is not installed.
brotli: 1.2.0
fastapi: 0.125.0
ffmpy: 1.0.0
gradio-client: 2.0.1
groovy: 0.1.2
httpx: 0.28.1
huggingface-hub: 1.2.3
jinja2: 3.1.6
markupsafe: 3.0.3
numpy: 2.3.2
orjson: 3.11.5
packaging: 25.0
pandas: 2.3.3
pillow: 12.0.0
pydantic: 2.12.4
pydub: 0.25.1
python-multipart: 0.0.21
pyyaml: 6.0.3
safehttpx: 0.1.7
semantic-version: 2.10.0
starlette: 0.50.0
tomlkit: 0.13.3
typer: 0.20.0
typing-extensions: 4.14.1
uvicorn: 0.38.0
mcp is not installed.
pydantic: 2.12.4
authlib is not installed.
itsdangerous: 2.2.0


gradio_client dependencies in your environment:

fsspec: 2025.12.0
httpx: 0.28.1
huggingface-hub: 1.2.3
packaging: 25.0
typing-extensions: 4.14.1

Severity

I can work around it

[yujincheng08]

Also the scrolling bar always has white background.

[yujincheng08]

If max_lines=1, the gr.Textbox is rendered as input with type="text". This leads to [type="text"] having higher priority.