🎨 Tools for making accessible colors

Contrast — simple macOS app to check color contrast ratios and identify accessible color pairings based on WCAG Guidelines.

Accessible color palette builder — a great tool for building accessible color palettes. Enter up to 6 colors and see the color matrix to know which colors can be combined.

ColorBox — a tool to algorithmically build accessible color systems. It also sorts by color, hue, saturation, and luminosity when picking color combinations.

Contraste — a free app for checking the accessibility of text against the WCAG rules.

Hex Naw — a free color accessibility tool for testing entire color systems for contrast and accessibility. You can test about 12 different colors at the same time.

90 examples — a free collection of accessible color themes:

variety of A11Y compliant color combos

90 combinations of text/background color that has sufficient contrast ratio.

Contrast Checker — another free color accessibility tool that helps check the contrast between the background of an element and the page itself.

Colorable — a free web-based contrast tool:

take a set color palette and get contrast values for every possible combination

includes pass/fail scores for the WCAG accessibility guidelines.

👓 Color blindness simulators

Stark — a paid Sketch plugin that will let you simulate different types of color blindness.

Color Oracle — a free color blindness simulator. It uses the algorithm for simulating color vision impairment, so you can see colors as they are seen by colorblind people.

Toptal’s color filter — this online tool lets you test your website and shows you how people with different color blindness will see your pages.

🙌 Accessibility testing tools

ANDI — a free accessibility testing tool for web content:

provides automated detection of accessibility issues

gives practical suggestions to improve accessibility and checks 508 compliance.

WAVE — a free web accessibility evaluation tool:

provides visual feedback by injecting icons and indicators into your page

has browsers extensions for evaluating local, dynamic, or password-protected pages.

AChecker — a free accessibility testing web app, which allows you to check accessibility by web page URL, HTML file or even markup. Also, it enables additional options, such as CSS, HTML validator and more.

A11ygator — a free web tool to analyze websites against WCAG. Also available as a browser extension and as Twitter bot. And to find more accessibility tools, check Awesome Design Tools list.

🙌 Tools for iOS developers

Accessibility Inspector is a part of Xcode, the main IDE for developing iOS apps. Think of it as a built-in accessibility checker that goes through an iOS application and tries to find accessibility issues. Than Accessibility Inspector shows parts of an iOS app that can be done better and helps to check iOS assistive technologies.

VoiceOver helps navigate the app screen without seeing it. It also can be used for testing iOS apps assessability, when you enable it and try to use your app.

VoiceOver gives audible descriptions of what’s on your screen — from battery level, to who’s calling, to which app your finger is on. You can also adjust the speaking rate and pitch to suit your needs. When you touch the screen or drag your finger over it, VoiceOver speaks the name of the item your finger is on, including icons and text. To interact with the item, such as a button or link, or to navigate to another item, use VoiceOver gestures. — iPhone User Guide

Please take a look at Accessibility on iOS section on the Apple site to learn more about assistive technology, which you can support in your iOS app: