Compare software

Contrast FinderAccessible Color Matrix
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
  • Checks every color pairing in a palette at once
  • Grid view makes passing and failing combinations easy to scan
  • Checks one color pair at a time
  • Focused only on contrast, not other accessibility criteria
  • Focused only on contrast, with no palette generation
  • Small single-purpose tool with limited documentation
Web application, Self-hosted Web application
Open source Closed source
License: AGPL-3.0 License not stated
No account needed Not stated if an account is needed
Not stated if it works offline Not stated if it works offline

Checked September 24, 2026

Checked October 2, 2026

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