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Accessible Colors vs Colorable: catalog facts
Accessible Colors	Colorable
Free Used directly in the browser; the site mentions no pricing.	Free Free to use in the browser.
Web	Web
Checks against both WCAG AA and AAA levels Suggests the nearest passing colors instead of only failing a pair	Shows contrast ratio and WCAG level together HSL sliders for text and background
Based on WCAG 2.0 contrast rules Limited to text and background color pairs	Tests a single pair at a time Minimal interface with few extra features
Web application	Web application
Closed source	Closed source
License not stated	License not stated
Not stated if an account is needed	No account needed
Not stated if it works offline	Not stated if it 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.