10 · Colour contrast checker
Check text contrast against WCAG AA guidance for accessibility.
A quick contrast estimate. It does not assess font size, weight, or every accessibility requirement.
FREE ONLINE TOOL
Color Contrast Checker: Check WCAG Text Contrast
Check text and background contrast against common WCAG AA thresholds.
How to use this tool
Enter two HEX colours. WCAG AA guidance uses 4.5:1 for normal text and 3:1 for large text. This check does not cover every accessibility requirement.
Privacy and limits
This tool runs in your browser and does not upload its text or image inputs to a calculator service. Results are general information. Check important provider, carrier, or marketplace rules before relying on an estimate.
Common question
Do I need an account? No. Open the page and use the tool directly.