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Accessible Colors vs Colour Contrast Analyser: catalog facts
Accessible Colors	Colour Contrast Analyser
Free Used directly in the browser; the site mentions no pricing.	Free Free to download, with source code published on GitHub.
Web	Windows, macOS
Checks against both WCAG AA and AAA levels Suggests the nearest passing colors instead of only failing a pair	Screen-wide eyedropper for foreground and background Results for WCAG 2.0, 2.1 and 2.2
Based on WCAG 2.0 contrast rules Limited to text and background color pairs	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
Not stated if an account is needed	No account needed
Not stated if it works offline	Works offline
Official website Full listing and sources Checked September 24, 2026	Official website Full listing and sources Checked September 23, 2026

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