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Appearance

Settings → Appearance with color mode, themes and accents
Setting Choices
Color mode System, Light, Dark
Theme Synoec (cream paper, warm charcoal, copper accent; the default), Claude, Codex, Cursor, Antigravity
Code theme Match theme, GitHub, One, Solarized, Catppuccin, Gruvbox, Tokyo Night; also used for highlighted tool output
Accent 15 presets or a custom color
Colors Per-mode overrides for Background, Sidebar, Sent messages and Message box, with a contrast warning
Reading Text size 12–20, which sizes the whole app, not only replies; Response font Sans, Source Sans (bundled Source Sans 3) or Serif

The app icon follows macOS: Default, Dark, Clear or Tinted from your Icon & widget style in System Settings. There is no in-app icon picker.