Flag Theme Generator wót 301.st

Generate accessible browser themes inspired by 198 country flags. Dark, Light & AMOLED modes with WCAG contrast validation. Export palettes to CSS, Tailwind, shadcn/ui, Tokens Studio, and JSON.

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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

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Flag Theme Generator wót 301.st

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