Web Accessibility.

Web accessibility refers to the inclusive practice of removing barriers that prevent interaction with, or access to websites, by people with disabilities. When sites are correctly designed, developed and edited, all users have equal access to information and functionality.

Web accessibilityWikipedia
Introduction to Web AccessibilityWebAIM
Top 10 Tips for Making Your Website AccessibleUC Berkeley Web Access
AFB Accessibility ResourcesAmerican Foundation for the Blind
Accessible button contrast generatorButtonBuddyJanuary 18th, 2021
Web Fundamentals - AccessibilityGoogle DevelopersMay 29th, 2019
Tips for Designing Accessibility in Voice User InterfacesUX CollectiveNovember 2nd, 2017
Introduction to Web AccessibilityW3CFebruary 1st, 2005