Feature request: Custom colorscheme / Codex app

What variant of Codex are you using?

App

What feature would you like to see?

Feature Request: Custom Color Scheme Support for Codex macOS App

Problem

The Codex macOS app currently offers limited theme options (appears to only support basic dark/light modes). As a developer who maintains a consistent color scheme across my entire development environment—terminal, editor, and other tools—I'd like the ability to customize Codex's appearance to match my workflow.

Proposed Solution

Add support for custom color schemes in the Codex macOS app settings:

1. Built-in theme presets: Include popular themes like Catppuccin, Dracula, Nord, Solarized, One Dark, Tokyo Night, Gruvbox, etc.

1. Custom color configuration: Allow users to define their own colors via settings or a config file:

• Editor/diff view colors
• Syntax highlighting colors
• UI accent colors
• Background and foreground colors

1. macOS system integration: Option to follow system appearance (light/dark) while maintaining custom accent colors

Use Case

Many developers spend hours daily in Codex alongside their editor and terminal. Having a jarring color mismatch between tools creates visual fatigue and disrupts focus. A consistent color scheme across all tools improves the overall development experience.

Additional Context

• The CLI already has related feature requests (#1618, #2020) for theme customization
• Similar apps (VS Code, iTerm2, Warp) all support extensive theme customization
• This would also address accessibility needs for users who require specific color contrasts

Additional information

_No response_