accessibility · free Companion App · local in this browser
Contrast Ratio Note Builder
Compare measured contrast ratios with the WCAG 2.2 minimums and produce a pass-or-fail log line.
Privacy: This App does not send or save your entries. Do not enter passwords, codes, full account numbers, or private identifiers.
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
- World Wide Web Consortium, Web Accessibility Initiative — Understanding Contrast (Minimum), WCAG 2.2
WCAG 2.2 sets minimum contrast ratios for normal and large text.
Reviewed 2026-10-09. Contrast is one part of accessible design. Pair it with clear labels and focus styles.
What this App does not do
This App compares ratios you measured. It does not sample colors, compute ratios from hex values, or certify compliance.
This free App has no paid features. It does not contact an agency, employer, bank, seller, provider, or other person.