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UI Colors vs 0to255: catalog facts
UI Colors	0to255
Freemium Free to use, with a paid Pro upgrade that unlocks extra options.	Freemium Can be tried for free; 0to255 Studio offers sign-up for an account.
Web	Web
Generates full Tailwind shade scales from one color Previews palettes on realistic UI examples and shadcn/ui components	Shows all lighter and darker variations at once instead of using sliders Color grid clusters similar colors for quick scanning
Some features require a Pro subscription Focused on Tailwind CSS naming and scales	Pricing for the Studio version is not clearly stated Needs an internet connection
Web application	Web application
Closed source	Closed 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 Checked September 23, 2026	Official website Full listing and sources Checked October 1, 2026

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