Compare software

Contrast FinderColour Contrast Analyser
Free

Free to use online and open source for self-hosting.

 Free

Free to download, with source code published on GitHub.

Web, Self-hosted Windows, macOS
  • Suggests valid colors close to the original
  • Choose to adjust text or background color
  • Screen-wide eyedropper for foreground and background
  • Results for WCAG 2.0, 2.1 and 2.2
  • Checks one color pair at a time
  • Focused only on contrast, not other accessibility criteria
  • Windows and macOS only
  • Checks one color pair at a time
Web application, Self-hosted Downloadable app
Open source Open source
License: AGPL-3.0 License: GPL-3.0
No account needed No account needed
Not stated if it works offline Works offline

Checked September 24, 2026

Checked September 23, 2026

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