Free tool
Contrast Checker
Check any foreground/background color pair for WCAG 2.1 accessibility compliance. See your contrast ratio instantly and get passing alternatives if needed.
The quick brown fox
Aa Bb Cc Dd 1 2 3 4 5
Small text at 14px
21:1
Contrast ratio
AA ✓ Normal
≥ 4.5:1
AA ✓ Large
≥ 3:1
AAA ✓ Normal
≥ 7:1
We audit accessibility across your site.
Bloomlight runs a full accessibility audit on your key pages every day, and background sweeps check the other pages as capacity allows — catching contrast failures, missing alt text, and more.
One page is a start.
Bloomlight checks accessibility on your key pages every day, and sweeps the rest of your site as capacity allows — not just the colors, but alt text, focus order, and everything our page audits flag.