Flag Theme — Country Flag Browser Themes

Generate browser themes from 198 country flags. Dark, Light & AMOLED modes. WCAG contrast. Export to CSS, Tailwind, shadcn/ui.

Available on: Chrome Web Store Firefox Add-ons Edge Add-ons
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Create accessible browser themes inspired by real country flags.

Browse 198 country palettes in the side panel and preview themes instantly. Switch between Dark, Light and AMOLED modes to find the best look for your browser.

Features

  • 198 country flag palettes generated from real national flags
  • Instant live preview in the side panel
  • Three modes — Dark / Light / AMOLED
  • WCAG-checked contrast so text stays readable on every palette
  • Export to CSS variables, Tailwind config, JSON, shadcn/ui, Tokens Studio (W3C DTCG)
  • Apply with one click straight from the side panel
  • Fully local processing — zero network requests, zero accounts

Export for designers & developers

Open the side panel to export your theme as CSS custom properties (with the --uc- prefix), a Tailwind config (uc namespace), shadcn/ui HSL variables, Tokens Studio in the W3C DTCG format, or raw JSON with metadata.

Privacy

All processing happens locally in your browser. No network requests, no telemetry, no tracking, no account required.

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