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Contrast RatioColor Review
Free

Free to use in the browser.

 Free

Free to use in the browser with no paid tier shown.

Web Web
  • Updates the ratio live as you type
  • Handles semi-transparent colors with an error margin
  • Edit colors in hex, RGB, HSL, HSV or CMYK
  • Live preview of body text and headlines
  • Checks one color pair at a time
  • The hosting page includes marketing content from Siege Media
  • Checks one color pair at a time
  • Requires a browser and connection
Web application Web application
Closed source Closed source
License not stated License not stated
No account needed No account needed
Not stated if it works offline Needs internet

Checked September 23, 2026

Checked October 1, 2026

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