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Accessible Color Matrix vs Paletton: catalog facts
Accessible Color Matrix	Paletton
Free Free to use in the browser.	Free No paid tier; the site states advertising is its only profit and asks for donations.
Web	Web
Checks every color pairing in a palette at once Grid view makes passing and failing combinations easy to scan	Color models from monochromatic to triad and tetrad, with or without complement, plus a free-style mode Vision simulation filter for several forms of color blindness, gamma, desaturation and grayscale
Focused only on contrast, with no palette generation Small single-purpose tool with limited documentation	Requires JavaScript in the browser; no installable app Ad-supported; the site asks visitors not to use ad blockers
Web application	Web application, Hosted service
Closed source	Closed source
License not stated	License not stated
Not stated if an account is needed	Not stated if an account is needed
Not stated if it works offline	Not stated if it works offline
Official website Full listing and sources Checked October 2, 2026	Official website Full listing and sources Checked September 20, 2026

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