Accessibility & Contrast
Check color contrast ratios against WCAG standards and simulate color blindness.
The quick brown fox
jumps over the lazy dog.
Color Blindness Simulation
About Color Accessibility Checker
Ensure your color choices meet accessibility standards and provide inclusive experiences for all users. Test color combinations against WCAG guidelines, evaluate contrast ratios, and identify potential barriers for users with visual impairments or color vision differences.
Essential for designers, developers, and organizations committed to creating accessible digital experiences that comply with legal requirements and serve users of all abilities effectively.
WCAG Compliance Testing
Contrast Ratio Analysis
Automatically calculate contrast ratios between text and background colors, ensuring compliance with WCAG AA and AAA standards for different text sizes.
Color Vision Simulation
Preview how your colors appear to users with different types of color blindness, including protanopia, deuteranopia, and tritanopia.
Focus Visibility Testing
Ensure focus indicators and interactive elements have sufficient contrast and visibility for keyboard navigation users.
Multi-Level Compliance
Test against WCAG 2.1 Level A, AA, and AAA standards to determine the appropriate compliance level for your project requirements.
Advanced Accessibility Features
Low Vision Simulation
Test how your colors perform for users with low vision, cataracts, or other visual impairments that affect color and contrast perception.
Screen Reader Compatibility
Ensure color-coded information has alternative text descriptions and doesn't rely solely on color to convey important information.
High Contrast Mode Testing
Verify your designs maintain functionality and readability when users enable high contrast mode or custom color schemes.
Batch Color Analysis
Test entire color palettes and design systems simultaneously to identify accessibility issues across your complete color scheme.
Legal Compliance & Standards
ADA Compliance
Ensure your color choices meet Americans with Disabilities Act requirements for digital accessibility in the United States.
Section 508 Standards
Verify compliance with federal accessibility requirements for government agencies and contractors in the US.
EN 301 549 European Standards
Meet European accessibility requirements for public sector websites and mobile applications.
International Guidelines
Comply with accessibility standards from various countries and regions for global product deployment.
Frequently Asked Questions
What's the minimum contrast ratio I need?
WCAG AA requires 4.5:1 for normal text and 3:1 for large text (18pt+ or 14pt+ bold). AAA level requires 7:1 and 4.5:1 respectively for enhanced accessibility.
How common is color blindness?
About 8% of men and 0.5% of women have some form of color vision deficiency, making accessibility testing crucial for inclusive design.
Can I use color alone to convey information?
No, WCAG guidelines require that information conveyed by color must also be available through other visual means like text, icons, or patterns.
Do accessibility requirements apply to all websites?
While legal requirements vary by jurisdiction, following accessibility best practices benefits all users and is increasingly expected across all digital products.