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WCAG 2.1 & ADA Compliance

Color Contrast Checker

Test color combinations against Web Content Accessibility Guidelines (WCAG 2.1 AA and AAA). Ensure your website is legible for everyone.

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Contrast Ratio
14.2 : 1
Superb Contrast
WCAG AA Normal Text
PASS
Min 4.5 : 1
WCAG AA Large Text
PASS
Min 3.0 : 1
WCAG AAA Normal Text
PASS
Min 7.0 : 1
WCAG AAA Large Text
PASS
Min 4.5 : 1

Sample Text (32px)

Sample Text (24px)

Sample Text (18px)

Sample Text (16px)

Sample Text (14px)

Sample Text (12px)

Accessible Presets

Understanding WCAG 2.1 Color Contrast Standards

The Web Content Accessibility Guidelines (WCAG) specify that foreground text must contrast sufficiently with its background to remain readable.

Level AA (Standard Compliance): Requires a contrast ratio of at least 4.5:1 for normal text (under 18pt or 14pt bold) and at least 3:1 for large text (18pt+ or 14pt+ bold).
Level AAA (Enhanced Accessibility): Requires a contrast ratio of at least 7:1 for normal text and 4.5:1 for large text. Recommended for government, healthcare, and financial applications.
Design & Accessibility

About the WCAG Color Contrast Ratio Checker

The SyncoBee Color Contrast Checker evaluates color combinations against Web Content Accessibility Guidelines (WCAG 2.1). It calculates the precise contrast ratio between text and background colors and awards Pass/Fail ratings for AA and AAA compliance across normal text, large text, and UI components.

How to Use the Contrast Checker

Follow these quick steps to get instant results in your browser

1

Pick Foreground (Text) Color

Input the hex code or use the color picker for your text or UI icon color.

2

Pick Background Color

Input the hex code or choose the background canvas color.

3

Review Contrast Ratio Score

Analyze the calculated ratio (e.g. 7.5:1) and inspect Pass/Fail badges for WCAG AA and AAA standards.

4

Tweak for Compliance

Adjust lightness sliders until your combination meets the required 4.5:1 (AA) or 7:1 (AAA) thresholds.

Why Use SyncoBee's Free Contrast Checker?

Built for privacy, speed, and zero server lock-in

WCAG 2.1 AA & AAA Standards

Evaluates standard text (4.5:1), large text (3:1), and UI components (3:1) for compliance.

Live Visual Preview

Displays real sample text and button elements rendered in your selected color pairing.

Lightness Adjustment Sliders

Quickly lighten or darken colors to reach passing contrast thresholds without starting over.

Frequently Asked Questions

Everything you need to know about this tool, privacy, and usage limits

What is a good contrast ratio for web accessibility?

WCAG Level AA requires a contrast ratio of at least 4.5:1 for normal text and 3:1 for large text (18pt+ or 14pt bold). Level AAA requires 7:1 for normal text and 4.5:1 for large text.

Why is accessibility contrast important?

Sufficient contrast ensures your content is readable for users with visual impairments, color blindness, or in bright outdoor ambient lighting conditions. It also directly improves search engine UX evaluations.

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