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0to255 vs Colordot: catalog facts
0to255	Colordot
Freemium Can be tried for free; 0to255 Studio offers sign-up for an account.	Free The web version is free to use; iOS app pricing is not stated.
Web	iOS, Web
Shows all lighter and darker variations at once instead of using sliders Color grid clusters similar colors for quick scanning	Very simple mouse-driven picking Builds a palette by clicking
Pricing for the Studio version is not clearly stated Needs an internet connection	Few features beyond picking and saving colors No contrast checking or export options described
Web application	Downloadable app, Web application
Closed source	Closed source
License not stated	License not stated
Not stated if an account is needed	Not stated if an account is needed
Needs internet	Not stated if it works offline
Official website Full listing and sources Checked October 1, 2026	Official website Full listing and sources Checked October 1, 2026

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