The complete mobile accessibility solution.

Color Contrast is a tool to measure the contrast between two colors in a screenshot or mobile website, helping ensure your app meets the internationally recognized recommendations in the Web Content Accessibility Guidelines (WCAG), for both versions 2.1 and 3.0 (Silver)

Color Contrast has the following features:
+ Verify that the color contrast between two colors in an app, website or photo is sufficient to pass WCAG 2.1 accessibility guidelines / Section 508.
+ View suggested colors
+ Generate a report that can be shared using SMS, Email or Notes.
+ Verify color contrast directly from Safari and Photos app.
+ Audit web pages for compliance using AXE.

To use Color Contrast

1. Load an image or website by tapping the icon in the top right corner. The image can be an existing image from the Photo Library or a new picture taken with the camera. Enter a URL to load a mobile website.
2. Move each color picker in turn to select two colors.
You can also pan around the image by swiping left/right/up/down or pinch to zoom in/out.
3. The Color Contrast results will be displayed at the bottom of the screen.
4. Tap the 'Share' icon to create a report that can be emailed, added to notes, copied or saved to your Photo Library.

About WCAG 2.1

WCAG 2.1 accessibility guidelines have three levels of compliance, A, AA and AAA. When considering large text (i.e. text which is above 18pt or larger), the minimum AA color contrast ratio is 3:1 and for AAA the ratio is 4.5:1. For normal text, the AA color contrast ratio is 4.5:1 and for AAA the color contrast ratio is 7:1.

For more information about WCAG 2.1, see

* WCAG 3.0 (Silver) *
The W3C Accessibility Guidelines 3.0 (Silver) reference an experimental color algorithm known as S-LUV Advanced Perceptual Contrast (SAPA) or Advanced Perceptual Contrast Algorithm. This algorithm can be enabled within the app via left-hand menu. To re-iterate, this algorithm is experimental and is likely to change in future.

For more information on SAPC-APCA, visit

Copy colors to clipboard

With Color Contrast you can also copy the current color to the clipboard in the follow formats:
- HTML Hex (e.g. #EEFFEE)
- UIColor from RGBA (e.g. UIColor(red:0, green:0, blue:0, alpha:0) )
- UIColor from HSB (e.g UIColor(hue:0, saturation:0, brightness:0, alpha:0))

We are continually iterating on Color Contrast, if you have any questions or feedback, please contact

What’s New

Version 5.0

User experience updates based on feedback from Apple Design review at WWDC
Conduct color contrast reviews and accessibility audits from within Safari and the Photos app.

Ratings and Reviews

2.4 out of 5
13 Ratings

13 Ratings

(: ME :) ,

Nice utility

Just wish the design and experience were much better. It doesn’t feel like a native iOS app at all. But it does the job.

Dsantos11 ,

Needs better transparency on cost of app

The details don’t appear to clearly explain there is a monthly $.99 fee to use the app. You are basically forced to a screen to sign up for 7-Day free trial. Fine if that is the model - but make it clear in the app details up front so users know that before downloading. Feels like a bait and switch operation otherwise.

Developer Response ,

Thank you for the feedback - the upgrade screen has now been redesigned to make this clearer.

SP_Brooklyn ,

Tricked into buying as free

Was checking out the app... Doesn't seem native for iOS... Get to one feature there's mostly a blank screen with an X button that only leads to 'buy ad free' version. Hit my home button to get out of it, but it of course completed a purchase.


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App Privacy

The developer, Philip Strain, 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 Linked to You

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

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  • Family Sharing

    With Family Sharing set up, up to six family members can use this app.

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