WCAG Color Contrast Checker (AA & AAA Accessibility)

A WCAG-compliant color contrast checker that tests text and background color combinations for AA and AAA accessibility standards.

Instantly calculate contrast ratios, preview readability, and ensure accessible color combinations — fast, accurate, and completely free.

Color Picker

Select or enter a color code

#2596BE

HSL/HSV Square Picker

Contrast Checker

Conversion

Variations

Color Combinations

Blindness Simulator

Core Features

Instant Multi-Format Conversion
Enter a color in HEX, RGB or HSL — all formats update in real time.
Auto-Correction & Smart Parsing
The tool automatically fixes incomplete or invalid color formats.
Alpha Channel Support
Full support for HEXA, RGBA and HSLA values.
Large Preview Panel
Visualize how the converted color looks on realistic UI surfaces.
One-Click Copy for Developers
Copy HEX, RGB or HSL instantly for CSS, mobile apps or design tools.

How To Use

Enter a Color Value — type a HEX / RGB / HSL color in the input field.

View Instant Output — all corresponding color codes update automatically.

Adjust the Color (Optional) — use sliders (if available) to fine-tune lightness or tone.

Copy the Result — click to copy HEX / RGB / HSL to your clipboard.

Find answers to commonly asked questions

What is a WCAG color contrast checker?

A WCAG color contrast checker tests the contrast ratio between text and background colors to ensure accessibility compliance with WCAG 2.0 AA and AAA standards.

What contrast ratio is required for WCAG AA and AAA?

WCAG AA requires a minimum contrast ratio of 4.5:1 for normal text, while AAA requires at least 7:1.

Is this color contrast checker free?

Yes. This WCAG color contrast checker is completely free and works directly in your browser without registration.