Free WCAG Contrast Checker | Web Accessibility Tool

Advanced WCAG Contrast Checker

Text Color

Background Color

Poor (1:1) Good (4.5:1) Excellent (7:1+)

21.00

WCAG AA

Minimum contrast for normal text (4.5:1)

WCAG AAA

Enhanced contrast for normal text (7:1)

WCAG AA Large

Minimum for large text (3:1)

WCAG UI

Minimum for graphical objects (3:1)

Sample Text Preview

This is how smaller text would appear with these colors

Suggested Text Colors

Suggested Backgrounds

Advanced WCAG Contrast Checker Tool - Free Online Accessibility Checker

What is the WCAG Contrast Checker Tool?

Our free online WCAG Contrast Checker helps designers, developers, and content creators ensure their color combinations meet Web Content Accessibility Guidelines (WCAG) standards. This tool checks the contrast ratio between text and background colors, providing instant feedback on accessibility compliance.

Key Features

• Real-time contrast ratio calculation
• WCAG AA & AAA compliance verification
• Color suggestions for better accessibility
• Dark mode support
• Text size simulation (normal, large, UI)
• Interactive preview with sample text
• No installation required - works in your browser

How to Use the WCAG Contrast Checker Tool

Follow these simple steps to check your color contrast:

Step 1: Select Your Colors

• Choose text color
  • Click the color picker or enter a HEX code
  • Or use the eyedropper tool if supported by your browser
• Select background color
  • Repeat the same process for your background
• Optionally swap colors with one click

Step 2: Check Compliance

The tool automatically calculates:

• Contrast ratio (displayed prominently)
• WCAG AA compliance (4.5:1 for normal text)
• WCAG AAA compliance (7:1 for normal text)
• Large text & UI compliance (3:1)

Step 3: Review Suggestions (If Needed)

If your contrast is insufficient:

• The tool suggests better text colors
• Provides alternative background options
• Shows pre-calculated contrast ratios for each suggestion

Step 4: Implement Accessible Colors

• Copy HEX or RGB values directly
• Apply to your website, app, or design project
• Retest after adjustments

Why Color Contrast Matters for Web Accessibility

• Legal Compliance
  • Meets ADA, Section 508, and other accessibility laws
• Better User Experience
  • Readable for users with visual impairments
  • Clear in various lighting conditions
• SEO Benefits
  • Accessibility is a ranking factor for search engines

Who Should Use This Tool?

• Web designers creating accessible interfaces
• Developers implementing color schemes
• Content creators ensuring readable text
• UX researchers testing accessibility
• Business owners avoiding legal risks

Frequently Asked Questions (FAQ)

Is this tool really free?

Yes! No signup, no payments—just accurate contrast checking.

What's the difference between WCAG AA and AAA?

• AA (Minimum Compliance)
  • 4.5:1 for normal text
  • 3:1 for large text (18pt+)
• AAA (Enhanced Compliance)
  • 7:1 for normal text
  • 4.5:1 for large text

Can I check images with this tool?

This tool checks solid colors only, but you can:

1. Extract dominant colors from images
2. Test those colors here for compliance

Additional Accessibility Tips

• Avoid pure black on white (can cause eye strain)
• Test with real users (color blindness simulators help too)
• Use semantic HTML (proper heading structure)

Free WCAG Contrast Checker | Web Accessibility Tool

Description: Test color contrast ratios instantly for WCAG compliance. Free online tool for designers & developers to ensure accessible color combinations.

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