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Colour Contrast Analyser vs Color Review: catalog facts
Colour Contrast Analyser	Color Review
Free Free to download, with source code published on GitHub.	Free Free to use in the browser with no paid tier shown.
Windows, macOS	Web
Screen-wide eyedropper for foreground and background Results for WCAG 2.0, 2.1 and 2.2	Edit colors in hex, RGB, HSL, HSV or CMYK Live preview of body text and headlines
Windows and macOS only Checks one color pair at a time	Checks one color pair at a time Requires a browser and connection
Downloadable app	Web application
Open source	Closed source
License: GPL-3.0	License not stated
No account needed	No account needed
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.