Blackfuel theme for Open WebUI

A custom Open WebUI theme that matches the Blackfuel ("FUEL") SaaS brand: near-black surfaces with a single neon-green accent (#d8ff3e). The theme is tuned for Open WebUI's dark mode.

The styling lives entirely in custom.css, which the Dockerfile bakes into the official Open WebUI 0.9.6 image at /app/build/static/custom.css (Open WebUI loads it via the <link href="/static/custom.css"> in its app.html). The selectors are matched against the 0.9.6 markup; expect to revisit them on a major Open WebUI upgrade.

docker build -t openwebui-blackfuel .

docker run -p 3000:8080 -e OPENAI_API_KEY=your_secret_key -v open-webui:/app/backend/data --restart always openwebui-blackfuel

Then open http://localhost:3000 and switch the interface to Dark mode (Settings → General → Theme) to see the brand surfaces.

Brand reference

Tokens are taken from the Blackfuel SaaS frontend (ai-platform/saas/frontend):

Role	Hex
Accent (neon green)	#d8ff3e
App background	#050505
Sidebar	#0a0a0a
Surfaces / inputs	#121212
Border	#262626
Text	#d9d9d9

Fonts (loaded from Google Fonts at runtime): Inter (body), Rajdhani (headings), JetBrains Mono (code), Orbitron (brand).