Compare software

Contrast FinderColorable
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
  • Shows contrast ratio and WCAG level together
  • HSL sliders for text and background
  • Checks one color pair at a time
  • Focused only on contrast, not other accessibility criteria
  • Tests a single pair at a time
  • Minimal interface with few extra features
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

Checked September 24, 2026

Checked September 23, 2026

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