POUR – Perceivable, Operable, Understandable, Robust
Summary
POUR is a way of approaching web accessibility by breaking it down into four main aspects: information should be Perceivable, interfaces should be Operable, content should be Understandable, and the meaning of the content should be Robust to changes in the way it is accessed.
Perceivable
Information and user interface components must be presentable to users in ways they can perceive.
Text Alternatives
Provide text alternatives for any non-text content so that it can be changed into other forms people need, such as large print, braille, speech, symbols or simpler language.
Time-based Media
Provide alternatives for time-based media.
Adaptable
Create content that can be presented in different ways (for example simpler layout) without losing information or structure.
Distinguishable
Make it easier for users to see and hear content including separating foreground from background.
Operable
User interface components and navigation must be operable.
Keyboard Accessible
Make all functionality available from a keyboard.
Enough Time
Provide users enough time to read and use content.
Seizures
Do not design content in a way that is known to cause seizures.
Navigable
Provide ways to help users navigate, find content, and determine where they are.
Understandable
Information and the operation of user interface must be understandable.
Readable
Make text content readable and understandable.
Predictable
Make Web pages appear and operate in predictable ways.
Input Assistance
Help users avoid and correct mistakes.
Robust
Content must be robust enough that it can be interpreted reliably by a wide variety of user agents, including assistive technologies.
Compatible
Maximize compatibility with current and future user agents, including assistive technologies.