Color Contrast Checker Online - WCAG 2.1 Compliance

Text Color

Background Color

Sample text for preview

Text Size: Weight:

Contrast Ratio

21.00

WCAG 2.1 Compliance

AA (Small Text)

AA (Large Text)

AAA (Small Text)

AAA (Large Text)

Color Information

Foreground: RGB(0, 0, 0)

Background: RGB(255, 255, 255)

Luminance (FG): 0.00

Luminance (BG): 1.00

Suggestions

This combination has perfect contrast.

Swap Colors Random

Advanced Online Color Contrast Checker

The Color Contrast Analyzer by SiD X Tool is a free and powerful accessibility checker that helps you verify if your text and background color combinations are WCAG 2.1 compliant. Whether you're a designer, developer, or content creator, this tool helps you improve usability and readability for all users, including those with visual impairments.

Why Color Contrast is Important

✅ Ensures visual accessibility for users with low vision
✅ Required for compliance with WCAG 2.1 AA/AAA standards
✅ Enhances readability and user experience on all devices

Features of Our Contrast Ratio Checker

🎯 Real-time contrast ratio calculation (from 1.00 to 21.00)
🎨 Color pickers with HEX + RGB display
📐 Text size and font weight selection for AA/AAA compliance
📊 Scale visualization and WCAG pass/fail indicators
🔄 Swap & random color options for testing multiple scenarios

What is a Good Contrast Ratio?

The minimum recommended contrast ratio by WCAG is:

4.5:1 for small text (AA)
3:1 for large or bold text (AA)
7:1 for AAA small text

Who Should Use This Tool?

🧑‍💻 Web Developers
🎨 UI/UX Designers
📄 Content Creators & Bloggers
🏫 Accessibility Auditors

FAQs

Q: Is this tool WCAG 2.1 compliant?
A: Yes. It checks AA and AAA compliance based on font size and weight.
Q: Can I use HEX or RGB values?
A: Yes, both color formats are supported and converted in real-time.
Q: Is it free to use?
A: 100% free. No registration or login required.

Conclusion

The Color Contrast Checker by SiD X Tool ensures that your website and design elements are readable and inclusive. Try different combinations, meet accessibility standards, and create designs that truly include everyone.