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