We’re all used to ADA and accessibility standards in both the legal and ethical sense in the marketplace. Whether it is ensuring that there are access ramps to buildings or options for those with specific impairments or conditions to have equal access to services and venues. We expect this level of accommodation in our society.
Thankfully, in recent years that has started to be somewhat uniformly extended to the web. Right now there is no law or department of justice standard for what that looks like on the web. However, there is consensus that the WCAG 2.0 Level AA standard is one that does a great job of providing an equitable experience to those with disabilities who wish to navigate websites.