[FEATURE]: [Desktop] Per-app appearance override (Light / Dark / System) independent of macOS system theme

[remotxavier]

Feature hasn't been suggested before.

• I have verified this feature I'm about to request hasn't been suggested before.

Describe the enhancement you want to request

Feature request
Add an in-app Appearance setting to the macOS desktop app (OpenCode.app) that lets users force Light, Dark, or System mode independently of the macOS global appearance.

Current behavior
OpenCode.app follows the macOS system appearance. The theme selector (Cmd+P → theme) only affects markdown/syntax rendering inside chat — not the app chrome (background, sidebar, panels).

Selecting a "dark" theme like Tokyo Night while macOS is in Light mode still leaves the app with a white background.

Desired behavior
A new Appearance section accessible via Cmd+, (Settings) or the command palette, with three options: Light · Dark · System (default).

Comparable apps that already do this:

Outlook for Mac (Preferences → General → Appearance)
Slack, VS Code, Chrome, Discord, etc.
Why
Many users prefer a dark UI for code/chat tools while keeping the rest of macOS in Light mode (system apps readability, design work, accessibility, personal preference). Forcing system-wide Dark mode is not a viable workaround.

Related (not duplicates)
#480 — sync with OS (complementary, would still be the "System" default)
#18397 — themes lacking a light variant (TUI-focused)
Thanks!

[github-actions]

This issue might be a duplicate of existing issues. Please check:

• [Desktop] Per-app appearance override (Light / Dark / System) independent of macOS system theme #26169: Identical feature request by the same author — same title and description for per-app appearance override (Light/Dark/System) on macOS desktop.

If this is intentional (e.g., a re-submission with a corrected title), please close the earlier issue and note the relationship. Otherwise, please close this one as a duplicate.

[remotxavier]

yes, this one (26175) was created to meet our [contributing guidelines]. I will close previous one: 26169

[JaapHaitsma]

I see it is there. I could not find it earlier either, because there is no scrollbar

[remotxavier]

Confirmed — the feature is now available in the Desktop app under Settings → Appearance → Color scheme (Light / Dark / System). Delivered via PR #30824 (merged 2026-06-05).

Closing as resolved. Thanks @arvsrn 🎉

Note for other users: the option is at the top of the Appearance panel — scroll if you don't see it initially, the panel doesn't show a visible scrollbar.

[JaapHaitsma]

I now published a PR #35555 such that we get a scrollbar when hovering over the panel, because my mouse does not have scroll wheel and keyboard did not work. My PR fixes it