Principles of WCAG Design
Explore the principles of accessible design as described by WCAG 2.2
The WCAG standards are categorized based on four main principles: perceivable, operable, understandable and robust, often referred to as POUR
Percievable
Operable
Understandable
Robust
Perceivable
Information and user interface components must be presentable to users in ways they can perceive.
Apple Case study
Key Points
- Consistent Alt-Text
- Captions for time-based media
- Multi-device support
Operable
Information and user interface components must be presentable to users in ways they can perceive.
Gov.uk Case study
Key Points
- Reliable keyboard accessibility
- Clear and consistent navigation
Understandable
Information and the operation of user interface must be understandable.
BBC Case study
Key Points
- Readible and consistent font usage
- Uniform layout
Robust
Content must be robust enough that it can be interpreted reliably by a wide variety of user agents, including assistive technologies.
Microsoft Case study
Key Points
- Standards compliant HTML and CSS
- Consistant usage with older browsers, and assistive technology
- ARIA implementation