accessibility · free Companion App · local in this browser
Text Contrast Requirement Check
Turn a measured contrast ratio, the font size, and the conformance level into the required ratio and a pass or fail result.
Enter your numbers
Enter only the details needed for this task. Check them against the original source.
Your result
Your result will appear here.
Engine self-test
Running golden cases…
Source notes
- W3C Web Accessibility Initiative — Understanding Contrast (Minimum)
WCAG 2.2 requires 4.5:1 contrast for normal text (AA) and 7:1 (AAA), with 3:1 for large text.
Reviewed 2026-10-10. Contrast is one of many accessibility requirements; it does not guarantee legibility on its own.
What this App does not do
This App checks one measured ratio against one requirement. It does not measure colors, cover non-text contrast, or replace testing with real users.
This free App has no paid features. It does not contact an agency, employer, bank, seller, provider, or other person.