UtilToolkits
Request a Tool
Home
Text Tools
Image Tools
CSS Tools
Coding Tools
Color Tools
Calculator Tools
Productivity Tools
Fun Tools
Video Tools
Other Tools
BlogAI Content Detector
CodeCast
Play CodeType CodeCode to Image

Your Favorites

Sign in to view your favorites

Tool Categories

UtilToolkits
© 2026 UtilToolkits. All Rights Reserved.
AboutContactPrivacyTerms
  1. Home
  2. Tools
  3. Contrast Checker

Quick Tip: Design

Want to create a modern, frosted-glass effect in your UI? A Glassmorphism Generator can help you create the perfect CSS for this popular design trend.

Contrast Checker

Contrast Ratio

21.00:1

The quick brown fox jumps over the lazy dog.

Normal Text (AA)

Pass

Large Text (AA)

Pass

More Color Tools

Complementary Color Palette Generator

Generate beautiful color palettes from a base color including complementary, hex, and harmonious schemes.

Try Now

Color Wheel

Interactive color wheel to generate color themes with harmony presets (analogous, complementary, triadic, and more).

Try Now

CSS Color Code Converter

Convert between HEX/HEXA, RGB/RGBA, HSL/HSLA, and CSS color keywords.

Try Now

About this Tool

Design accessible websites with confidence. The Contrast Checker instantly evaluates the color contrast between your text and background, ensuring your content is readable for everyone. It checks against WCAG guidelines (AA and AAA) so you can meet accessibility standards and provide a better user experience.

Accessibility isn't just a buzzword; it's a necessity. This tool calculates the luminance difference between two colors. A low contrast ratio makes text hard to read for people with low vision or color blindness. Meeting WCAG standards ensures your site is inclusive and usable by the widest possible audience.

  1. Select your text color and background color using the color pickers.
  2. Instantly see the contrast ratio score.
  3. Check the 'Pass/Fail' indicators for WCAG AA and AAA standards.
  4. Adjust the colors until you achieve a passing score.
  • Checking your brand colors to ensure they are accessible on the web.
  • Designing buttons and calls-to-action that stand out and are readable.
  • Auditing a website for accessibility compliance.
  • Selecting a color palette for a new design system.
  • WCAG Compliance: Automatically checks against Web Content Accessibility Guidelines.
  • Real-Time Scoring: See the contrast ratio update as you pick colors.
  • Visual Preview: See exactly how your text looks on the chosen background.
  • Smart Suggestions: Helps you find compliant color combinations.

This tool uses the relative luminance formula defined by the W3C. The contrast ratio can range from 1:1 (no difference) to 21:1 (black text on white). WCAG Level AA requires a ratio of at least 4.5:1 for normal text, while Level AAA requires 7:1.

What is a good contrast ratio?

For normal text, aim for at least 4.5:1 (Level AA). For large text (18pt+), 3:1 is acceptable. Ideally, try for 7:1 (Level AAA) for maximum accessibility.

Why does accessibility matter?

It ensures people with visual impairments can read your content. Plus, accessible sites often rank better in SEO and are easier for everyone to use, even in bright sunlight.

Does this affect my design?

It improves it! High contrast usually leads to cleaner, more legible designs.

All calculations and data processing for this tool are performed locally in your browser. UtilToolkits does not send any of your data to an external server, ensuring your information remains private and secure.

Credits:Next.js•React•Tailwind CSS•Lucide Icons