The World Wide Web Consortium (W3C) is the international community behind the standards that the world wide web runs on. Its members develop the standards that the Web runs on.
"Led by Web inventor and Director Tim Berners-Lee and CEO Jeffrey Jaffe, W3C's mission is to lead the Web to its full potential"
Tim Berners-Lee, W3C Director and inventor of the World Wide Web is quoted as saying that "the power of the Web is in its universality. Access by everyone regardless of disability is an essential aspect."
W3C provides tools for testing web page accessibility and advice on the changes that we all need to make.
https://www.w3.org/standards/webdesign/accessibility
The Web Accessibility Initiative (WAI) at W3C provides a range of resources, guidelines, tools and applications to help make the Web accessible to people with auditory, cognitive, neurological, physical, speech, and visual disabilities.