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0to255 vs HTML Color Codes: catalog facts
0to255	HTML Color Codes
Freemium Can be tried for free; 0to255 Studio offers sign-up for an account.	Free Free to use in the browser; no paid tier is mentioned on the page.
Web	Web
Shows all lighter and darker variations at once instead of using sliders Color grid clusters similar colors for quick scanning	Converts between Hex, RGB, HSL and OKLCH Extracts colors from uploaded images
Pricing for the Studio version is not clearly stated Needs an internet connection	Reference-style site rather than a full palette workspace Developer is not named on the page
Web application	Web application
Closed source	Closed 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 Checked October 1, 2026	Official website Full listing and sources Checked September 23, 2026

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