WCAG: Web Content Accessibility Guidelines
If you run a website, app, or digital service, you're probably already required to comply with WCAG — even though it isn't a law itself. The Web Content Accessibility Guidelines (WCAG) are the global standard for digital accessibility, and they've been incorporated into legal frameworks across the EU, UK, US, Canada, and Australia. You don't have a choice about whether to follow them; you only have a choice about whether you comply proactively or reactively after a complaint.
Developed by the W3C's Web Accessibility Initiative, WCAG covers visual, auditory, physical, speech, cognitive, language, learning, and neurological disabilities. It's the closest thing to a universal accessibility rulebook the world has.