Contrast Aa

WCAG Color Accessibility Tool

Only for iPhone

Free · Designed for iPhone

iPhone

Ensure your designs are accessible to everyone. Check color contrast ratios against WCAG standards and get smart suggestions for compliant color combinations. Check colour contrast ratios instantly. Validate your designs against WCAG 2.0 accessibility standards with real-time preview across AA and AAA levels. Contrast Checker is the essential tool for designers and developers who care about accessibility. Whether you're building a brand new interface or auditing an existing design, this app helps you ensure every colour combination meets the highest accessibility standards. KEY FEATURES - Real-Time Contrast Ratio Calculation Enter any two colours and instantly see the contrast ratio. Results update in real time as you adjust your palette. - WCAG AA & AAA Validation Check your colour pairs against both AA and AAA compliance levels for normal text, large text, and UI components. - Smart Colour Suggestions When a colour combination falls short, get intelligent suggestions for accessible alternatives that stay close to your original palette. - Hex, RGB & HSL Support Work with colours in whatever format suits your workflow. Switch seamlessly between Hex, RGB, and HSL inputs. - Visual Preview See how your text and background combinations actually look with a live preview, so you can make informed design decisions at a glance. - Share & Export Results Easily share contrast check results with your team or export them for documentation purposes. BUILT FOR DESIGNERS Contrast Checker was created with design professionals in mind. The clean, focused interface lets you work quickly without distractions. Whether you're a UI designer, front-end developer, or accessibility consultant, this tool fits naturally into your workflow. WCAG 2.0 STANDARDS The Web Content Accessibility Guidelines (WCAG) define minimum contrast ratios to ensure content is readable for people with visual impairments. Contrast Checker makes it effortless to verify compliance, helping you build inclusive digital experiences.

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The developer, MIZOU, CO., LTD., indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .

  • Data Used to Track You

    The following data may be used to track you across apps and websites owned by other companies:

    • Identifiers
    • Usage Data

  • Data Linked to You

    The following data may be collected and linked to your identity:

    • Identifiers
    • Usage Data

Privacy practices may vary based, for example, on the features you use or your age. Learn More

Accessibility

The developer has not yet indicated which accessibility features this app supports. Learn More

Information

  • Provider
    • MIZOU, CO., LTD.
  • Size
    • 3.9 MB
  • Category
    • Utilities
  • Compatibility
    Requires iOS 18.0 or later.
    • iPhone
      Requires iOS 18.0 or later.
    • Mac
      Requires macOS 15.0 or later and a Mac with Apple M1 chip or later.
    • Apple Vision
      Requires visionOS 2.0 or later.
  • Languages
    • English and Japanese
  • Age Rating
    4+
  • Copyright
    • © 2026 Mizou Co., Ltd.
  • Developer Website
  • Privacy Policy

    • More by MIZOU, CO., LTD.