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Colour Contrast Checker vs Contrast Finder: catalog facts
Colour Contrast Checker	Contrast Finder
Free Free to use in the browser.	Free Free to use online and open source for self-hosting.
Web	Web, Self-hosted
Clear AA and AAA pass or fail results Adjust colours with RGB or HSL sliders	Suggests valid colors close to the original Choose to adjust text or background color
Checks one colour pair at a time Licence of the published source is not stated in the research	Checks one color pair at a time Focused only on contrast, not other accessibility criteria
Web application	Web application, Self-hosted
Closed source	Open source
License not stated	License: AGPL-3.0
No account needed	No account needed
Not stated if it 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.