♿ Color Contrast Checker

Check WCAG compliance for color combinations with real-time analysis and accessibility scoring.

Contrast Analysis

Contrast Ratio

0.00:1Poor

Visual Preview

Normal text sample

Large text sample (18px+)

Small text sample

Foreground

#ffffff

RGB: 255, 255, 255

Background

#000000

RGB: 0, 0, 0

WCAG Compliance

Web Content Accessibility Guidelines

WCAG provides standards to make web content more accessible to people with disabilities. Contrast ratios ensure text remains readable for users with visual impairments.

AA Normal

Normal text (under 18pt or 14pt bold)

4.5:1

Required

21.00:1

AA Large

Large text (18pt+ or 14pt+ bold)

3.0:1

Required

21.00:1

AAA Normal

Normal text (under 18pt or 14pt bold)

7.0:1

Required

21.00:1

AAA Large

Large text (18pt+ or 14pt+ bold)

4.5:1

Required

21.00:1

Summary

AA Compliance:✓ Pass

AAA Compliance:✓ Pass

Excellent! This color combination exceeds WCAG AAA standards, providing optimal readability for all users.

About WCAG Contrast Standards

What is WCAG?

The Web Content Accessibility Guidelines (WCAG) are international standards that make web content more accessible to people with disabilities. Contrast ratios ensure text remains readable for users with visual impairments.

How Contrast is Calculated

Contrast ratio is calculated using the relative luminance of colors:
(L1 + 0.05) / (L2 + 0.05)
Where L1 is the lighter color and L2 is the darker color.

WCAG Levels Explained

AA Level (Recommended)

• Normal text: 4.5:1 contrast ratio
• Large text (18pt+): 3:1 contrast ratio
• Minimum compliance for most websites

AAA Level (Enhanced)

• Normal text: 7:1 contrast ratio
• Large text (18pt+): 4.5:1 contrast ratio
• Enhanced accessibility for better user experience