Codex desktop: accent presets fail with a third-party API key, and custom accent does not apply to the chat box

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

The affected Codex desktop app version has not been confirmed.

What subscription do you have?

Using a third-party API key for the preset-color issue. ChatGPT subscription details are not provided.

What platform is your computer?

Reporting machine: macOS 27.0, Apple Silicon (Darwin 27.0.0 arm64 arm).

What issue are you seeing?

There are two problems with Settings > Appearance > Accent in the Codex desktop app:

1. Preset accent colors cannot be applied when using a third-party API key. Attempting to change Accent to one of the built-in preset values does not work.
2. A Custom accent color does not apply to the chat box. After setting Accent to Custom and choosing a color, the chat box in the conversation view does not reflect that color.

What steps can reproduce the bug?

Problem 1: Preset accent colors

1. Use the Codex desktop app with a third-party API key.
2. Open Settings > Appearance > Accent.
3. Try selecting a built-in preset accent color.
4. Observe that the accent cannot be changed to the selected preset.

Problem 2: Custom accent color

1. Open Settings > Appearance > Accent.
2. Select Custom and choose a color.
3. Return to the conversation view and inspect the chat box.
4. Observe that the custom accent color is not applied to the chat box.

What is the expected behavior?

• Built-in accent presets should be selectable and applied when using a third-party API key.
• A custom accent color should apply to the chat box consistently with the Accent setting.

Additional information

The third-party API key condition is specifically reported for problem 1. Whether problem 2 also depends on the authentication method has not been established.

Reproduce both failures in Settings > Appearance > Accent on macOS, including the third-party API key case and the custom-color chat box case. Trace how the Accent setting is stored and consumed by the conversation view. Done means built-in presets can be selected with a third-party key and a custom accent is reflected in the chat box.