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WCAG 2.1 AA & AAA

WCAG Color Contrast & Accessibility Checker

Ensure your web designs are legible and fully accessible. Calculate official WCAG 2.1 contrast ratios for normal body text, large headings, and UI elements.

WCAG Color Contrast & Accessibility CheckerWCAG 2.1 Compliant

Calculate contrast ratio between text and background colors according to official W3C accessibility guidelines.

Select Colors

Color Pair Presets:
Contrast Ratio
17.85 : 1
Exceptional AAA contrast
WCAG Passed
Normal Text (AA)
Requires 4.5 : 1
Large Text (AA)
Requires 3.0 : 1
UI Components
Requires 3.0 : 1
Normal Text (AAA)
Requires 7.0 : 1
Large Text (AAA)
Requires 4.5 : 1

Headline Text Sample (18pt / 24px)

This paragraph demonstrates normal body text rendering at 14px size. Legibility is vital for accessibility compliance, ensuring users with low vision can comfortably read your content without eye strain.

Caption text (11px)
WCAG 2.1 Compliance Validation
Real-Time Typography Preview
1-Click Invert / Swap Colors
Copyable CSS Declarations

How to Use WCAG Color Contrast & Accessibility Checker (Step-by-Step Guide)

No software installation required. Complete your task in 3 easy steps directly in your browser.

1

Select Foreground & Background

Use color pickers or enter hex values for text and background colors.

2

Review Compliance Scores

Check instant pass/fail status for WCAG AA (4.5:1) and AAA (7.0:1) standards.

3

Preview & Copy CSS

Inspect real-time typography legibility and copy ready-to-use CSS color rules.

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Got Questions?

Frequently Asked Questions

WCAG 2.1 Level AA requires a minimum contrast ratio of 4.5:1 for normal text and 3.0:1 for large text (18pt+ or 14pt bold).