ContrastKit

Contrast and legibility check

Free · In‑App Purchases · Designed for iPad. Not verified for macOS.

Enter two colours. Get the contrast ratio, a pass or fail, and the nearest colour that fixes it. You picked a colour that looks right, and somewhere between the mockup and the screen it became unreadable. ContrastKit tells you before anyone else notices. IS IT READABLE? Enter the text colour and the background — hex or rgb() — and ContrastKit gives you the WCAG contrast ratio and a verdict for each case that matters: body text, large text and headings, and the edges of icons and controls. A live sample shows the real thing, not a swatch. AND IF NOT, WHAT FIXES IT A failing pair is only useful if you know what to do about it. ContrastKit finds the nearest shade of the same hue that reaches AA, for the text and for the background, so the design keeps the colour it was built around and the words become legible. Tap to apply, or copy the hex. CHECK IT FOR EVERYONE The same pair is redrawn as people with protanopia, deuteranopia, tritanopia and achromatopsia see it, with the ratio recalculated each time. A combination that separates for most people can collapse for some — this is where you find that out. KEEP THE ONES THAT WORK Save a pair with a note about where it is used, and the values are waiting the next time that component comes up. BUILT TO BE QUICK • Works completely offline — nothing you enter leaves your device • No account, no sign-in • Available in 17 languages ContrastKit is free. A single one-time purchase removes ads — no subscription. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

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First release: WCAG contrast verdicts, nearest passing colour suggestions, and colour-vision previews.

Version 1.0.1

The developer, sakamoto kenichiro, 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

  • Data Not Linked to You

    The following data may be collected but it is not linked to your identity:

    • Identifiers
    • Usage Data
    • Diagnostics

Privacy practices may vary, for example, based 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

Seller
  • sakamoto kenichiro
Size
  • 30.6 MB
Category
  • Developer Tools
Compatibility
Requires iOS 14.0 or later.
  • iPhone
    Requires iOS 14.0 or later.
  • iPad
    Requires iPadOS 14.0 or later.
  • iPod touch
    Requires iOS 14.0 or later.
  • Mac
    Requires macOS 11.0 or later and a Mac with Apple M1 chip or later.
  • Apple Vision
    Requires visionOS 1.0 or later.
Languages
English and 16 more
  • English, Arabic, Dutch, French, German, Indonesian, Italian, Japanese, Korean, Portuguese, Russian, Simplified Chinese, Spanish, Thai, Traditional Chinese, Turkish, Vietnamese
Age Rating
4+
In-App Purchases
Yes
Copyright
  • © 2026 AppDevelopSK
  • Developer Website
  • Privacy Policy

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