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Color Contrast Checker – Test WCAG AA & AAA Accessibility

Check contrast ratios between text and background colors, verify WCAG compliance, and improve readability for accessible web design.

8.42:1

Contrast Ratio

AAA Pass
Small Text: ✔ Pass
Large Text: ✔ Pass

Preview Text

The quick brown fox jumps over the lazy dog.

Check how readable your text appears against the selected background color.

Color Contrast Checker for WCAG Accessibility

The Color Contrast Checker helps designers, developers and content creators test the contrast ratio between text and background colors. It instantly calculates contrast values and verifies whether your color combinations meet WCAG AA and AAA accessibility standards for improved readability and user experience.

Accessible color combinations are essential for websites, mobile apps, dashboards, forms and digital products. This tool allows you to compare two colors, preview the results in real time, and ensure your design is readable for all users, including people with visual impairments.

What Is Color Contrast?

Color contrast refers to the difference in brightness between foreground and background colors. Higher contrast makes text easier to read, while low contrast can create accessibility issues and reduce readability.

How the Color Contrast Checker Works

  • Select a text color.
  • Select a background color.
  • View the calculated contrast ratio instantly.
  • Check WCAG AA and AAA compliance results.
  • Preview how your text appears with the selected colors.
  • Swap colors to test alternative combinations.

WCAG Contrast Ratio Requirements

The Web Content Accessibility Guidelines (WCAG) define minimum contrast ratios to improve readability and accessibility for users with low vision and color perception challenges.

  • AA Normal Text: Minimum 4.5:1
  • AA Large Text: Minimum 3:1
  • AAA Normal Text: Minimum 7:1
  • AAA Large Text: Minimum 4.5:1
Why Color Contrast Matters
  • Improves website accessibility.
  • Enhances text readability.
  • Supports WCAG compliance requirements.
  • Creates better user experiences.
  • Reduces eye strain for users.
  • Improves usability on mobile devices.
Best Practices for Accessible Color Design
  • Use dark text on light backgrounds whenever possible.
  • Avoid low-contrast gray-on-gray combinations.
  • Test all important text elements.
  • Check buttons, forms and navigation links.
  • Verify accessibility before publishing designs.
Who Can Use This Tool?

This Color Contrast Checker is useful for web designers, UI/UX designers, front-end developers, accessibility specialists, marketers, content creators and anyone building websites or digital products that require accessible color combinations.

Instant Contrast Ratio Results

The tool automatically calculates the contrast ratio between your selected colors and displays whether they pass or fail WCAG standards. You can quickly test multiple color combinations and find accessible alternatives without manually performing calculations.

Accessible Design Starts with Color

Choosing accessible color combinations is one of the easiest ways to make your website more inclusive. Use this free Color Contrast Checker to create readable, professional and WCAG-compliant designs for all users.

Color Categories

Explore popular color shades with HEX, RGB and HSL codes for design and development.

White Shades

Black Shades

Blue Shades

Red Shades

Green Shades

Pink Shades

Purple Shades

Yellow Shades

Orange Shades

Gray Shades

Cyan Shades

Brown Shades

Frequently Asked Questions

Common questions about color contrast ratios, WCAG accessibility standards and readable color combinations.

A color contrast checker is a tool that measures the contrast ratio between text and background colors. It helps determine whether a color combination meets WCAG accessibility standards and provides sufficient readability.

For normal text, WCAG recommends a minimum contrast ratio of 4.5:1 for AA compliance. For enhanced accessibility, AAA compliance requires a ratio of at least 7:1.

WCAG AA is an accessibility standard defined by the Web Content Accessibility Guidelines. It requires a minimum contrast ratio of 4.5:1 for normal text and 3:1 for large text.

WCAG AAA is the highest accessibility level. It requires a minimum contrast ratio of 7:1 for normal text and 4.5:1 for large text to provide maximum readability.

Good color contrast makes text easier to read and helps users with low vision, color blindness or other visual impairments access content more effectively.

The contrast ratio is calculated using the relative luminance of the text color and background color. Ratios range from 1:1 (no contrast) to 21:1 (maximum contrast between black and white).

The highest possible contrast ratio is 21:1, which occurs between pure black (#000000) and pure white (#FFFFFF).

Yes. This Color Contrast Checker is designed for website accessibility testing, UI design, mobile app design, branding projects and any digital product that requires readable and WCAG-compliant color combinations.