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Color Review vs Ratio: catalog facts
Color Review	Ratio
Free Free to use in the browser with no paid tier shown.	Free Free and open source under GPL-3.0-or-later.
Web	macOS, Linux
Edit colors in hex, RGB, HSL, HSV or CMYK Live preview of body text and headlines	Checks text and non-text contrast criteria Supports a focus appearance criterion
Checks one color pair at a time Requires a browser and connection	Focused on WCAG criteria 1.4.3, 1.4.11, and 2.4.13
Web application	Downloadable app
Closed source	Open source
License not stated	License: GPL-3.0-or-later
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 October 8, 2026

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