Is Color Contrast Checker free?

Yes. Color Contrast Checker runs entirely in your browser. No data is uploaded or stored.

Does Color Contrast Checker work offline?

Yes. Once loaded, Color Contrast Checker works fully offline except for the QR code generator which uses a pinned CDN with SRI.

Local-only · nothing leaves your browser

Enter foreground and background colors to check WCAG accessibility contrast ratios. See if your color combination meets AA and AAA standards.

Foreground

Background

Preview Text

The quick brown fox jumps over the lazy dog

—

Ratio

—

AA Normal

—

AA Large

—

AAA Normal

⚠ JavaScript is required for this tool — the page content above works without it.

What is Color Contrast Checker?Enter foreground and background colors to check WCAG accessibility contrast ratios. See if your color combination meets AA and AAA standards.
Is Color Contrast Checker free?Yes. Color Contrast Checker runs entirely in your browser. No data is uploaded or stored.
Does Color Contrast Checker work offline?Yes. Once loaded, Color Contrast Checker works fully offline except for the QR code generator which uses a pinned CDN with SRI.