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Colour Contrast Analyser vs Accessible Colors: catalog facts
Colour Contrast Analyser	Accessible Colors
Free Free to download, with source code published on GitHub.	Free Used directly in the browser; the site mentions no pricing.
Windows, macOS	Web
Screen-wide eyedropper for foreground and background Results for WCAG 2.0, 2.1 and 2.2	Checks against both WCAG AA and AAA levels Suggests the nearest passing colors instead of only failing a pair
Windows and macOS only Checks one color pair at a time	Based on WCAG 2.0 contrast rules Limited to text and background color pairs
Downloadable app	Web application
Open source	Closed source
License: GPL-3.0	License not stated
No account needed	Not stated if an account is needed
Works offline	Not stated if it works offline
Official website Full listing and sources Checked September 23, 2026	Official website Full listing and sources Checked September 24, 2026

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