Real-Time WCAG Contrast Checker | Accessibility Compliance Tool

Color Selection

Foreground (Text) Color

#000000

Background Color

#ffffff

Live Preview

Sample Text Preview

Text Size: 18px

Font Weight:

Normal Bold Bolder

Advanced Controls

Sample Text

Text Type

Real-time Updates

Contrast Ratio Results

21.00

AA AAA APCA (Beta)

WCAG AA: PASS

WCAG AAA: PASS

APCA: 100%

Detailed Analysis

Normal Text: WCAG AA requires 4.5:1

Large Text: WCAG AA requires 3:1

Graphics: WCAG requires 3:1

UI Components: WCAG requires 3:1

Sample Text Display

This is how your text will appear with the selected color combination. The contrast ratio between foreground and background colors determines readability for users with visual impairments.

This is smaller text (14px) to test readability at different sizes.

Color Information

Foreground Color

Hex: #000000

RGB: rgb(0, 0, 0)

HSL: hsl(0, 0%, 0%)

Luminance: 0.00

Background Color

Hex: #FFFFFF

RGB: rgb(255, 255, 255)

HSL: hsl(0, 0%, 100%)

Luminance: 1.00

How to Use the Contrast Checker Tool for Web Accessibility

Web accessibility is crucial for creating inclusive digital experiences. One of the most important aspects of accessibility is ensuring sufficient color contrast between text and background elements. Our real-time contrast checker tool helps designers and developers validate their color choices against WCAG (Web Content Accessibility Guidelines) standards.

Key Features of Our Contrast Checker

Real-time Analysis: See immediate results as you adjust colors
WCAG Compliance Validation: Check against AA and AAA standards
Multiple Text Type Support: Test normal text, large text, UI components, and graphics
Live Preview: Visualize how your text will appear to users
Color Information: Get detailed color data including hex, RGB, HSL, and luminance values
Preset Color Palettes: Quickly test common color combinations
Adjustable Text Properties: Modify text size and weight for accurate testing
Save and Share: Export your results or share them with team members

Understanding WCAG Contrast Requirements

The Web Content Accessibility Guidelines (WCAG) specify minimum contrast ratios for text and images of text:

WCAG Level AA (Minimum): 4.5:1 for normal text, 3:1 for large text (18px+ or 14px+ bold)
WCAG Level AAA (Enhanced): 7:1 for normal text, 4.5:1 for large text
UI Components & Graphics: 3:1 minimum contrast for visual elements

Tips for Better Color Contrast

Test both light and dark mode versions of your design
Consider users with color vision deficiencies by testing with color blindness simulators
Remember that contrast requirements are more stringent for smaller text
Use this tool during the design phase to avoid costly redesigns later
Check all states of interactive elements (hover, focus, active)
Test with real content rather than placeholder text
Consider environmental factors like glare on mobile devices outdoors

By using our contrast checker tool regularly in your workflow, you can ensure your digital products are accessible to the widest possible audience, including the estimated 300 million people worldwide with color vision deficiencies.

Pro Tip: For optimal accessibility, aim for contrast ratios that exceed the minimum requirements. This provides a safety margin for varying display conditions and user visual abilities.