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WCAG Color Contrast Checker — Test Text Accessibility Ratio

Test text and background contrast ratios against WCAG 2.1 AA and AAA standards.

Interactive Tool Workspace

Loading secure in-browser engine for WCAG Color Contrast Checker...

Processing Limits & Device Capabilities

Processed client-side in browser memory. Recommended maximum file size is 50 MB on desktop and 15 MB on mobile.

Zero Cloud Transmission: Zero bytes are uploaded to any server. File handling is constrained only by available device RAM.

How to Use WCAG Color Contrast Checker

  1. Choose or enter your Text Color (HEX code or picker).
  2. Choose or enter your Background Color.
  3. Inspect the computed contrast ratio (e.g. 4.8:1).
  4. Review pass/fail badges for WCAG AA and AAA requirements on normal and large text.

About WCAG Color Contrast Checker

WCAG Color Contrast Checker calculates relative luminance to ensure text remains clearly legible for users with low vision or color blindness.

Frequently Asked Questions

What is the minimum WCAG contrast ratio for body text?

WCAG Level AA requires at least 4.5:1 for regular text, and 3:1 for large text (18pt or 14pt bold).

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