The member chat (chat.inference.coop) is styled to the co-op's house palette using Open WebUI's native /static/custom.css hook — no image patching, no license issues (the branding surface is untouched; we only load styles).

Files

openwebui-custom.css — the theme (copied to the chat app as /app/data/coop-theme.css, served as /static/custom.css)
figtree-*.woff2 — the four Figtree weights (OFL), copied into the chat app's static dir and served same-origin from /static/fonts/ (avoids cross-origin font CORS problems)

How it's deployed

State on the chat app (50ae6c97-… on Cloudron):

Persistent copies live in /app/data/ (survives app updates):
- /app/data/coop-theme.css
- /app/data/fonts/figtree-*.woff2

Startup hook in /app/data/env.sh (appended, labeled "Co-op theme"):

if [ -f /app/data/coop-theme.css ]; then
  cp /app/data/coop-theme.css /run/openwebui/static/custom.css 2>/dev/null || true
  mkdir -p /run/openwebui/static/fonts
  cp /app/data/fonts/*.woff2 /run/openwebui/static/fonts/ 2>/dev/null || true
fi

This is needed because Open WebUI's start script recreates /run/openwebui/static/ from pristine image files on every boot.

Live serving — Open WebUI's built index.html already contains <link rel="stylesheet" href="/static/custom.css">, so no HTML changes.

To update the theme

# 1. Push the new CSS to the app's persistent storage
cloudron push --app 50ae6c97-e851-4d17-b013-51ca7a4e5be0 \
  openwebui-custom.css /app/data/coop-theme.css

# 2. Apply immediately (no restart needed)
cloudron exec --app 50ae6c97-e851-4d17-b013-51ca7a4e5be0 -- \
  cp /app/data/coop-theme.css /run/openwebui/static/custom.css

Verify at https://chat.inference.coop/static/custom.css.

Contrast notes (v2, 2026-09-29)

v1 remapped the full Tailwind gray scale, which drifted body text and placeholders toward olive and hurt readability. v2 rules:

Tint surfaces, not text. Backgrounds/borders (gray-50..300) get the cream/olive treatment; text-side tokens (gray-600+) stay near Tailwind defaults in light mode.
Explicit text contrast fixes for message bodies (.markdown-prose), placeholders, and secondary text, both modes.
Links darkened to #3f6e3e on cream (AA); lightened in dark mode.