📚WCAG Principles

Web Content Accessibility Guidelines (WCAG) for short.

The Web Content Accessibility Guidelines Principles

There are 4 principles of WCAG 2.0, and to remember them quickly, you can think of this acronym, POUR.

The 4 principles are:

Perceivable

This web principle is about processing web content by seeing, heating, or touching it. If there is one sense missing, the information should be perceivable through another sense.

Operable

In general, web content must have the ability to operate with both a keyboard and a mouse. However, it also means the ability to operate and correct mistakes through voice or other alternative input devices like switches or a head-controlled mouse.

Understandable

The principle understandable is where web content is presented in a consistent, predictable, readable form that reduces the chances of making errors and can be understood by different users.

Robust

Robust is a web accessibility principle that adopts standards to function or be understood across a wide range of technologies. It should also allow to continue to function in the future as technologies change and evolve.

What are the 3 levels?

Level of Conformance	Description	Example
Level A	The bare minimum of accessibility.	Providing alternative text for images.
Level AA	Everything in Level A plus a few additional requirements.	Ensuring that content is navigable using only a keyboard.
Level AAA	Everything is in Level A and Level AA plus a few additional requirements.	Providing sign language interpretation for video content.