All technology, including websites, must grant barrier-free access to people with disabilities.
For websites, that means meeting the Web Content Accessibility Guidelines (WCAG) 2.1 standards.
WCAG requires web content to be:

• Perceivable: Everything can be perceived in more than one way. For example, if someone cannot see, written content can be read by a screen reader.
• Operable: Everything can be operated in more than one way. For example, if someone cannot use a mouse, they can navigate using the keyboard.
• Understandable: Everything can be easily understood. For example, an error message points out the location of your mistake and how to fix it.
• Robust: Everything can roll up to the newest hardware and not break.

Use this link https://www.webaccessibility.com/
Enter your URL below to see how close you are to being compliant.
Once you’ve submitted your URL for testing, you will receive a report that includes:

• An overall compliance score (from 0% to 91%)
• A list of accessibility barriers (violations)
• Best practices for remedying those violations