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Contrast Finder vs APCA Contrast Calculator: catalog facts
Contrast Finder	APCA Contrast Calculator
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	Polarity aware, handling dark mode separately Shows contrast relative to font size and weight
Checks one color pair at a time Focused only on contrast, not other accessibility criteria	APCA is not yet a published WCAG requirement Results are not the same as WCAG 2 contrast ratios
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	Needs internet
Official website Full listing and sources Checked September 24, 2026	Official website Full listing and sources Checked October 1, 2026

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