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Flat UI Colors vs Coolors: catalog facts
Flat UI Colors	Coolors
Best for: Picking ready-made flat UI colors quickly	Best for: Fast color palette generator for browsing and tweaking combinations
Free Free to use in the browser.	Free + paid options Free to use with a paid plan for extra features.
Web	Web
280 curated colors in 14 palettes One-click copy of color codes All 3 strengths for Flat UI Colors 280 curated colors in 14 palettes One-click copy of color codes No account needed	Very fast palette generation with keyboard shortcuts Large community of shared palettes to browse
Fixed palettes, no palette generator Limited to the flat design style	Some features are locked behind a paid plan Web-based only, no offline desktop app
Web application	Web application
Not open source	Not open source
License not stated	License not stated
No account needed	Not stated if an account is needed
Needs internet	Not stated if it works offline
Official website Full listing and sources Sources for Flat UI Colors flatuicolors.com Catalog checked September 24, 2026	Official website Full listing and sources Sources for Coolors coolors.co Catalog checked September 22, 2026

“Not stated” means we have not confirmed it. Features can vary by device and plan.