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Muzli Colors vs Flat UI Colors: catalog facts
Muzli Colors	Flat UI Colors
Best for: UI designers choosing a palette and checking it in a mock layout	Best for: Picking ready-made flat UI colors quickly
Free Free to use in the browser.	Free Free to use in the browser.
Web	Web
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	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
Part of a wider promotional design inspiration service Requires an internet connection	Fixed palettes, no palette generator Limited to the flat design style
Web application	Web application
Not open source	Not open source
License not stated	License not stated
Not stated if an account is needed	No account needed
Needs internet	Needs internet
Official website Full listing and sources Sources for Muzli Colors colors.muz.li Catalog checked September 24, 2026	Official website Full listing and sources Sources for Flat UI Colors flatuicolors.com Catalog checked September 24, 2026

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