What is Level AAA contrast?

Level AAA is the strictest accessibility tier, requiring a 7:1 contrast ratio for normal text and 4.5:1 for large text.

Why is color contrast important?

Good color contrast ensures that your content is readable for users with visual impairments, color blindness, or people viewing screens in bright sunlight.

Is this contrast checker free?

Yes, it is 100% free with no login or limits.

Developer ToolsWCAG 2.1

WCAG Color Contrast Checker

Calculate color contrast ratios between text and background colors with WCAG 2.1 AA and AAA accessibility pass/fail compliance ratings.

17.85: 1

Excellent Contrast (AAA Compliant)

WCAG 2.1 requires a contrast ratio of at least 4.5:1 for normal body text and 3:1 for large text (18pt+ or bold 14pt+).

Color Selection

Foreground (Text) Color

Background Color

Recommended Accessible Pairs:

Live Preview in Chosen Colors

Quicklity Fast & Accessible Online Tools

This is a sample paragraph rendered using your exact text and background color combination. Check how easy it is to read this sample in real world screens.

Sample secondary text link

AA NormalPASS (≥4.5)

AA LargePASS (≥3.0)

AAA NormalPASS (≥7.0)

UI ElementsPASS (≥3.0)

How to Use WCAG Color Contrast Checker

Follow these simple steps to complete your task in seconds.

Select Foreground Text Color

Use the color picker or input a hex color code (#ffffff, #000000, etc.) for your text.

Select Background Color

Choose your background container or page color to compute the luminance difference.

Inspect WCAG AA/AAA Pass Ratings

Review the contrast ratio and verify if normal text, large headings, and UI elements pass compliance.

Why Choose Quicklity for WCAG Color Contrast Checker

Engineered for speed, privacy, and flawless conversion accuracy.

Precise WCAG 2.1 Formula

Calculates relative luminance according to the official W3C accessibility specifications.

AA & AAA Compliance Badges

Clear pass/fail indicators for normal body copy (4.5:1), large headlines (3:1), and UI components.

Live Interactive Preview

See your actual paragraph, heading, and button rendered directly in the chosen color scheme.

Curated Accessible Presets

Quickly test high-contrast accessible color pairs with one click.

Frequently Asked Questions about WCAG Color Contrast Checker

Everything you need to know about using this tool.

WCAG 2.1 Level AA requires a contrast ratio of at least 4.5:1 for normal body text and at least 3:1 for large text (at least 18pt or bold 14pt).

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