Color Contrast Checker (WCAG) - Free, Instant, In Your Browser
Enter a foreground and background hex color to calculate their WCAG 2.1 contrast ratio.
How to use Color Contrast Checker
- 1Enter the required date(s) and details above.
- 2Click Calculate - Color Contrast Checker runs instantly, right in your browser.
- 3Read your result below.
Your file is processed in your browser and is never uploaded.
Frequently Asked Questions
How does this work?
Using a standard, well-established method - see the description above for details.
Is my data sent to a server?
No - everything runs entirely in your browser with JavaScript. Nothing is uploaded.