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Color Contrast Checker

Check the contrast ratio between foreground text and background HEX colors against official W3C WCAG 2.1 AA and AAA accessibility guidelines.

Check WCAG 2.1 AA & AAA Text Color Contrast Ratios

WCAG Color Contrast Checker computes the exact luminance contrast ratio (from 1:1 to 21:1) between your foreground text color and background color, showing instant PASS or FAIL badges for WCAG AA and AAA accessibility standards.

Step-by-Step Instructions: How to Use Color Contrast Checker

  1. Pick or paste your Foreground Text HEX color and Background HEX color.
  2. Preview how headings and body copy look in the live sample card.
  3. Check the contrast ratio score and WCAG AA / AAA pass badges.

Practical Use Cases & Applications

  • Ensuring website buttons, navbars, and body text meet WCAG 2.1 AA accessibility compliance.
  • Improving Core Web Vitals & Lighthouse Accessibility scores for SEO.
  • Selecting readable dark-mode and light-mode color palettes for UI design systems.

100% Client-Side Privacy & Browser Architecture

Unlike traditional cloud converters that upload your private documents or inputs to remote servers, Kova Core executes Color Contrast Checker locally inside your browser tab using modern JavaScript, HTML5 Canvas, Web Crypto, and WebAssembly APIs. Your files and sensitive data never leave your device, ensuring instant zero-latency processing and strict compliance with Singapore PDPA and GDPR data protection standards.

Frequently Asked Questions (Color Contrast Checker)

Is the Color Contrast Checker on Kova Core completely free to use?

Yes. Color Contrast Checker is 100% free to use in your browser with no sign-up, no watermarks, and no software installation required.

Are my files or inputs uploaded to a server when I use Color Contrast Checker?

No. Color Contrast Checker runs client-side inside your web browser using JavaScript and Web APIs. Your files and data remain on your own device for complete PDPA and GDPR privacy.

How do I use Color Contrast Checker step by step?

Pick or paste your Foreground Text HEX color and Background HEX color. Preview how headings and body copy look in the live sample card. Check the contrast ratio score and WCAG AA / AAA pass badges.

Does Color Contrast Checker work on mobile phones as well as desktop computers?

Yes. Every utility in our Image & Graphic Utilities suite is responsive and works on iPhone, Android, iPad, Mac, Windows, and Linux browsers.

Related Image & Graphic Utilities