Codex sidebar background color changes when switching between different windows

Open 💬 0 comments Opened Aug 19, 2026 by thomasyu929

What version of the Codex App are you using (From “About Codex” dialog)?

26.813.12317

What subscription do you have?

Pro

What platform is your computer?

Darwin 25.0.0 arm64 arm

What issue are you seeing?

In Codex fullscreen mode, the sidebar background color unexpectedly changes when switching to another window and then back.

focuse on other window, then move cursor back to Codex, it will foucs automatically and sidebar bg color change.

<img width="812" height="670" alt="Image" src="https://github.com/user-attachments/assets/8538e3e3-4543-489d-a62e-64164a875792" />
<img width="678" height="730" alt="Image" src="https://github.com/user-attachments/assets/092a79ca-5561-4028-a09f-276a999dbbc7" />

<img width="780" height="666" alt="Image" src="https://github.com/user-attachments/assets/e75fdea4-8644-4a07-adf0-b9e077c92a82" />

What steps can reproduce the bug?

  1. Make Codex to fullscreen mode;
  2. Switch to other desktop or focus on other monitor, the sidebar bg color will change to gray;
  3. back to Codex, the bg color will change;

What is the expected behavior?

I think the bg color should always be gray like following:

<img width="678" height="730" alt="Image" src="https://github.com/user-attachments/assets/8c910d17-835e-490f-8297-0a7f0bad36c2" />

Additional information

I have already seen this issue in a few versions.

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