About A11y - Smart Color Contrast Checker
A professional WCAG color contrast checker that uses AI to test and suggest accessible color combinations that meet WCAG 2.1 and 2.2 AA/AAA compliance standards.
What is this tool?
A web-based accessibility tool that ensures color combinations meet WCAG standards. It provides real-time contrast ratio calculations for accessible designs.
Our tool calculates contrast ratios between foreground and background colors, showing whether they pass WCAG AA (4.5:1 for normal text, 3:1 for large text) and AAA (7:1 for normal text, 4.5:1 for large text) standards. The AI-powered engine suggests accessible color alternatives for inclusive digital experiences.
Features
Professional features for designers and developers who prioritize accessibility
Legal Protection
Reduce legal risk and ensure regulatory compliance. Protect against accessibility-related lawsuits.
Better UX & SEO
Improve readability for all users and boost search rankings with accessible design.
Key Features
AI-Powered Color Analysis
Instantly check contrast ratios with intelligent color suggestions
WCAG 2.1 & 2.2 Compliance
Full compliance with AA and AAA accessibility guidelines
Real-time Testing
Test color combinations as you type with instant feedback
Built with Modern Technologies
Cutting-edge tools for optimal performance
Static Site Framework
Astro 4 for fully static HTML output with React Islands for interactive components.
Styling
Tailwind CSS with a custom design system following accessibility best practices.
AI Engine
TensorFlow.js model running locally in the browser, no data leaves your device.
UI Components
Radix UI primitives with custom styling for accessibility-first components.
Related Accessibility Resources
External resources and guidelines for web accessibility compliance
GitHub Repository
This project is open source and available on GitHub
Our color contrast checker is an open-source project built for the accessibility community. You can view the source code, contribute improvements, report issues, or star the repository to show your support.
View on GitHubReady to Check Your Design?
Use our free tool to verify compliance against WCAG standards and create accessible color combinations.
Go to Contrast CheckerReport Issues & Contact
Found a bug or have suggestions? We'd love to hear from you!
If you encounter any issues, bugs, or have suggestions for improvements, please reach out. We're committed to making our tool the best it can be for the accessibility community.
Please include details about the issue, steps to reproduce, and your browser/device information.