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Color Review vs WhoCanUse: catalog facts
Color Review	WhoCanUse
Free Free to use in the browser with no paid tier shown.	Free Free to use; the developer accepts GitHub sponsorships.
Web	Web
Edit colors in hex, RGB, HSL, HSV or CMYK Live preview of body text and headlines	Previews each color blindness type and other vision conditions Shows share of people affected by each condition
Checks one color pair at a time Requires a browser and connection	Checks one color pair at a time Does not scan a live web page
Web application	Web application
Closed source	Closed source
License not stated	License not stated
No account needed	No account 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 September 23, 2026

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