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fix(tui): improve color contrast for light-background terminals (#40345)

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* fix(tui): improve colour contrast for light-background terminals (#38636)

Detect light terminal backgrounds via COLORFGBG and apply a WCAG
AA-compliant light palette. Adds OPENCLAW_THEME=light|dark env var
override for terminals without auto-detection.

Uses proper sRGB linearisation and WCAG 2.1 contrast ratios to pick
whichever text palette (dark or light) has higher contrast against
the detected background colour.

Co-authored-by: ademczuk <ademczuk@users.noreply.github.com>

* Update CHANGELOG.md

---------

Co-authored-by: ademczuk <andrew.demczuk@gmail.com>
Co-authored-by: ademczuk <ademczuk@users.noreply.github.com>
This commit is contained in:
Vincent Koc
2026-03-08 16:17:28 -07:00
committed by GitHub
parent 211f68f8ad
commit a3dc4b5a57
6 changed files with 381 additions and 5 deletions
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docs/web/tui.md
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@@ -122,6 +122,12 @@ Other Gateway slash commands (for example, `/context`) are forwarded to the Gate
- Ctrl+O toggles between collapsed/expanded views.
- While tools run, partial updates stream into the same card.
## Terminal colors
- The TUI keeps assistant body text in your terminal's default foreground so dark and light terminals both stay readable.
- If your terminal uses a light background and auto-detection is wrong, set `OPENCLAW_THEME=light` before launching `openclaw tui`.
- To force the original dark palette instead, set `OPENCLAW_THEME=dark`.
## History + streaming
- On connect, the TUI loads the latest history (default 200 messages).