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Contrast Finder vs Colour Contrast Checker: catalog facts
Contrast Finder	Colour Contrast Checker
Free Free to use online and open source for self-hosting.	Free Free to use in the browser.
Web, Self-hosted	Web
Suggests valid colors close to the original Choose to adjust text or background color	Clear AA and AAA pass or fail results Adjust colours with RGB or HSL sliders
Checks one color pair at a time Focused only on contrast, not other accessibility criteria	Checks one colour pair at a time Licence of the published source is not stated in the research
Web application, Self-hosted	Web application
Open source	Closed source
License: AGPL-3.0	License not stated
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 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.