Flag Theme Generator 301.st מאת

Create browser themes inspired by real country flags.

Flag Theme provides 198 national color palettes and lets you preview and apply themes directly in your browser using the browser.theme API.

Features

• Dark / Light / AMOLED modes
• WCAG-checked color contrast
• Live preview — see the theme before applying
• Side panel for quick browse and apply
• Open source — Apache 2.0 licensed

Export for Designers & Developers

Open the side panel to export your theme in five formats:

• CSS custom properties (--uc- prefix)
• Tailwind config (uc namespace)
• shadcn/ui HSL variables
• Tokens Studio (W3C DTCG format)
• Raw JSON with metadata

Privacy

All processing happens locally in your browser.

• No network requests
• No telemetry
• No tracking
• No account required

Permissions: storage only (for saving your preferences).



Website: flagtheme.com
Source code: GitHub