WCAG or Web Content Accessibility Guidelines Level AA is the internationally recognized technical standard for digital accessibility. While the text of the ADA does not explicitly list coding rules, U.S. courts and the Department of Justice consistently utilize WCAG Level AA as the legal benchmark to determine if a website is accessible.
Achieving this standard means your website’s code and design follow four core principles: it must be Perceivable (providing text descriptions for images), Operable (fully navigable without a mouse), Understandable (error messages on forms are clear and easily resolved), and Robust (compatible with current assistive technologies like screen readers).
Aligning your website natively with this specific technical standard is the only reliable way to prevent accessibility lawsuits.
The following table breaks down the POUR principles for consumer clarity:
| WCAG Principle | Technical Meaning | Practical Application for Websites |
| Perceivable | Information cannot be hidden from any user’s senses. | Providing “alt text” for images; ensuring adequate color contrast. |
| Operable | Interface components cannot require interaction a user cannot perform. | Ensuring all menus and forms can be navigated via keyboard alone. |
| Understandable | Operation of the user interface must be logical. | Clear error messages on checkout forms; predictable navigation. |
| Robust | Content must be reliably interpreted by various user agents. | Clean, semantic HTML that works flawlessly with screen readers. |
