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Flat UI Colors vs Muzli Colors: catalog facts
Flat UI Colors	Muzli Colors
Best for: Picking ready-made flat UI colors quickly	Best for: UI designers choosing a palette and checking it in a mock layout
Free Free to use in the browser.	Free Free to use in the browser.
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	Previews palettes on sample UI designs Search by use case such as dashboard or logo All 3 strengths for Muzli Colors Previews palettes on sample UI designs Search by use case such as dashboard or logo Large set of popular palettes and collections
Fixed palettes, no palette generator Limited to the flat design style	Part of a wider promotional design inspiration service Requires an internet connection
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	Needs internet
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 Muzli Colors colors.muz.li Catalog checked September 24, 2026

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