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WCAG Color Contrast & Accessibility Checker

Calculate color contrast ratios and verify compliance with WCAG 2.1 AA and AAA standards for accessible web design.

100% Local Processing: All calculations and conversions run entirely inside your browser. No private data is ever uploaded or recorded.
Contrast Ratio0:1⚠️ Low Contrast
Normal Text AA
≥ 4.5:1FAIL
Normal Text AAA
≥ 7.0:1FAIL
Large Text AA
≥ 3.0:1FAIL
Large Text AAA
≥ 4.5:1FAIL
UI Components
≥ 3.0:1FAIL

Live Interactive Visual Preview

#10B981 on #090D16

KORIXA adheres to top-tier digital accessibility and universal design standards. This checker guarantees effortless readability for all users across diverse display environments conforming to W3C WCAG 2.1.

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How to Use WCAG Color Contrast & Accessibility Checker

1

Enter Your Input

Paste, upload, or type your input directly into the editor or controls above.

2

Instant Processing

Computed 100% locally in your browser with fast execution and complete privacy guarantee.

3

Copy or Download

Quickly copy the processed output to your clipboard or download files with one click.

Technical Specifications & Standards

Architecture Client-Side Web Crypto / V8
Data Privacy 100% In-Browser (Zero Transfer)
Compliance W3C / RFC Standards
Availability Free Forever (Client-Side)
Recommended In-Depth Technical Guide

WCAG 2.1 Color Contrast Guide: Achieving Digital Accessibility Compliance

Essential guide to Web Content Accessibility Guidelines (WCAG) contrast ratios. Learn mathematical luminance formulas and pass/fail thresholds for AA and AAA compliance.

Read Full Guide

Frequently Asked Questions

What are WCAG AA and AAA thresholds?

AA requires at least 4.5:1 for normal text (3:1 for large text). AAA requires 7:1 for normal text.

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