Contrast Checker for WCAG Accessibility & Color Ratio Analyzer

Contrast Checker for WCAG Accessibility

Analyze foreground and background color combinations against official WCAG contrast ratio standards for web accessibility compliance.

Sample Accessible Heading Text
Regular body text preview for contrast evaluation.

WCAG Compliance Evaluation Report

AAA Pass
Contrast Metrics & Status:
Contrast Ratio: 4.5:1 | Normal Text (AA): Pass | Large Text (AA): Pass | AAA Compliance: Pass

Understanding WCAG Contrast Standards

Web Content Accessibility Guidelines (WCAG) require specific luminance contrast ratios between text and background elements to ensure readability for users with visual impairments and color deficiencies.

Compliance Thresholds

  • AA Standard: Requires a minimum contrast ratio of 4.5:1 for normal body text and 3:1 for large-scale text.
  • AAA Standard: Requires enhanced contrast ratios of 7:1 for normal text and 4.5:1 for large text.

Privacy & Security Note

All contrast ratio calculations, luminance algorithms, and evaluation checks execute entirely client-side within your browser environment. Your color selections and data are never transmitted or stored externally.