About WCAG Color Contrast Checker

Check the color contrast ratio between text and background colors according to Web Content Accessibility Guidelines (WCAG) 2.1 AA and AAA. Free online, 100% private, zero-server-load utility running directly in your web browser.

How to Use WCAG Color Contrast Checker

1. Enter your input parameters or adjustments above.
2. Customize any desired settings or calculation options.
3. Click the action button to process and view or copy your results instantly.

Key Features

• 100% Client-Side Privacy: Your data never leaves your device.
• Instant Real-Time Results: Calculations execute immediately in browser memory.
• Free & Unlimited: No registration, caps, or watermarks.

Frequently Asked Questions