- W3C WAI (Web Accessibility Initiative) - international standard for Web accessibility
- WCAG 2.1 (Web Content Accessibility Guidelines) - guidelines to make web content more accessible
- WAI-ARIA (WAI Accessible Rich Internet Applications) - provides functionality to assistive technology
- W3C Using ARIA - understand how to use aria in HTML
- WAI-ARIA Authoring Practices 1.1
- WebAIM
- Paciello Group
- Ebay accessibility patterns
- BBC accessibility guidelines
- Vox Media Accessibility Checklist
- MDN web docs
- Contrast and Color Accessibility - understanding WCAG 2 contrast and color requirements (WebAIM)
- Techniques for WCAG 2.1 - G183 - Using a contrast ratio of 3:1 with surrounding text and providing additional visual cues on focus for links or controls where color alone is used to identify them
- Techniques for WCAG 2.1 - G18 - Ensuring that a contrast ratio of at least 4.5:1 exists between text (and images of text) and background behind the text
- Techniques for WCAG 2.1 - G17 - Ensuring that a contrast ratio of at least 7:1 exists between text (and images of text) and background behind the text
- Axe Developer Tools for Firefox, Axe Developer Tools for Chrome
- Color Contrast Analyzer for Chrome
- NoCoffee Vision Simulator for FireFox, NoCoffee Vision Simulator for Chrome
- 24 Accessibility - series of articles on digital accessibility
- Leonie Watson - leading accessibility engineer, co-chair of W3C Web Platform Working Group @LeonieWatson
- Scott O'Hara - UX accessibility at Paciello Group @scottohara
- Alastair Campbell - director of accessibility at nomensa, co-chair of WCAG Working Group @alastc
- Inclusive Components - pattern library of accessible web interfaces
- Web Accessibility by Google - free course on making web applications accessible
- A11ycasts with Rob Dodson - series of videos on the fundamentals of building accessible apps by Rob Dodson, developer advocate at Google
- Leonie Watson conference talk about Accessibility