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Scale vs UI Colors: catalog facts
Scale	UI Colors
Best for: Designers building tint and shade scales for a UI color system	Best for: Web developers building a Tailwind CSS color palette
Free Free to use in the browser.	Free + paid options Free to use, with a paid Pro upgrade that unlocks extra options.
Web	Web
Builds a full scale from one base color Adjustable hue and saturation curves across the scale All 3 strengths for Scale Builds a full scale from one base color Adjustable hue and saturation curves across the scale Runs in the browser with nothing to install	Generates full Tailwind shade scales from one color Previews palettes on realistic UI examples and shadcn/ui components All 3 strengths for UI Colors Generates full Tailwind shade scales from one color Previews palettes on realistic UI examples and shadcn/ui components Adds neutral and status color scales
Focused on scales only, not full multi-color palettes Little documentation on the page itself	Some features require a Pro subscription Focused on Tailwind CSS naming and scales
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
Not stated if it works offline	Needs internet
Official website Full listing and sources Sources for Scale hihayk.github.io/scale Catalog checked September 24, 2026	Official website Full listing and sources Sources for UI Colors uicolors.app Catalog checked September 23, 2026

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