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UI Colors vs ColorBox: catalog facts
UI Colors	ColorBox
Freemium Free to use, with a paid Pro upgrade that unlocks extra options.	Free Free to use in the browser; no paid tier is shown on the page.
Web	Web
Generates full Tailwind shade scales from one color Previews palettes on realistic UI examples and shadcn/ui components	Fine control over each channel with easing curves Shows contrast ratios for every step
Some features require a Pro subscription Focused on Tailwind CSS naming and scales	Curve-based controls take some learning Aimed at systematic scales rather than quick inspiration
Web application	Web application
Closed source	Closed source
License not stated	License not stated
No account needed	No account needed
Needs internet	Not stated if it works offline
Official website Full listing and sources Checked September 23, 2026	Official website Full listing and sources Checked September 23, 2026

Catalog facts only. Anything “not stated” is unconfirmed. Check full listings for details.