Color Contrast Checker

Check color contrast ratios against WCAG 2.1 AA and AAA accessibility standards. Test foreground and background color combinations for readable text.

Key Capabilities & Features

✓ WCAG 2.1 AA & AAA compliance test
✓ Normal text, large text, UI components
✓ HEX, RGB, HSL support
✓ Live preview with score badge

WCAG Color Contrast Checker & Accessibility Audit Tool: Verify Compliance ratios to AA / AAA Standards

The Txlify WCAG Color Contrast Checker is a high-quality, offline design tool created to help developers and designers audit color choices for accessibility. Web content accessibility guidelines (WCAG) define specific contrast limits to ensure digital products are readable. Txlify calculates exact contrast and luminance scores locally on your machine, helping you build accessible interfaces while keeping your color schemes private.

Who is the Color Contrast Checker for?

Essential for frontend developers, UI designers, digital accessibility auditors, and brands building inclusive interfaces.

How to Use the Color Contrast Checker

Enter your background color hexadecimal value (e.g. #FFFFFF) inside the workspace.
Enter your foreground text color hexadecimal value (e.g. #1E40AF) inside the next field.
The relative contrast ratio (up to 21:1) updates instantly in the dashboard.
Review the clear pass/fail checklist for normal text, large headings, and interface components.

What you get

A comprehensive compliance report showing the relative contrast ratio and pass/fail assessments for all WCAG standards.

Why this matters

Low contrast can make text unreadable for many users. Designing with proper contrast ensures your content is accessible to everyone, avoiding potential legal compliance issues.

Frequently Asked Questions

What is WCAG AA contrast compliance?

It requires a contrast ratio of at least 4.5:1 for standard body text, and at least 3.0:1 for larger headings.

What are the contrast requirements for WCAG AAA standards?

AAA is the highest accessibility standard, requiring a contrast ratio of at least 7.0:1 for normal text and 4.5:1 for larger headings.

How is relative luminance calculated?

It is based on a standard mathematical formula that measures the relative brightness of any color on a scale from 0 to 1.

Can I check contrast ratios for custom color palettes?

Yes! Simply input your custom background and text color hexadecimal codes to get relative contrast ratios instantly.

Does this tool save any history of checked color codes?

No. Our accessibility checker runs completely in temporary browser memory, ensuring your design schemes remain private.

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