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WhoCanUse vs Color Review: catalog facts
WhoCanUse	Color Review
Free Free to use; the developer accepts GitHub sponsorships.	Free Free to use in the browser with no paid tier shown.
Web	Web
Previews each color blindness type and other vision conditions Shows share of people affected by each condition	Edit colors in hex, RGB, HSL, HSV or CMYK Live preview of body text and headlines
Checks one color pair at a time Does not scan a live web page	Checks one color pair at a time Requires a browser and connection
Web application	Web application
Closed source	Closed source
License not stated	License not stated
No account needed	No account needed
Not stated if it works offline	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.