Updated W3C Recommendation: Web Content Accessibility Guidelines (WCAG) 2.1
WCAG and supporting documents explain how to make content more accessible to people with disabilities.

Following these guidelines will make content more accessible to a wider range of people with disabilities, including accommodations for blindness and low vision, deafness and hearing loss, limited movement, speech disabilities, photosensitivity, and combinations of these
https://www.w3.org/news/2023/updated-w3c-recommendation-web-content-accessibility-guidelines-wcag-2-1/