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Perceivable, Operable, Understandable, and Robust

The POUR principles are the foundation of the Web Content Accessibility

Perceivable, Operable, Understandable, and Robust

Shawn Sandy (Ally.Cafe) ~

POUR: Perceivable, Operable, Understandable, and Robust

POUR - Perceivable, Operable, Understandable, and Robust principles are the foundation of the Web Content Accessibility Guidelines (WCAG) 2.2. These principles provide a framework for creating accessible web content that can be perceived, operated, understood, and robust for all users, including those with disabilities.

Perceivable

Web content should be presentable to users in ways they can perceive. This includes providing alternative text for non-text content, ensuring sufficient color contrast, and providing captions or transcripts for audio and video content.

Operable

User interface components and navigation should be operable by all users, including those who use assistive technologies like screen readers or alternative input devices. This includes providing keyboard accessibility, ensuring sufficient time for user interactions, and avoiding content that may cause seizures or physical reactions.

Understandable

Information and the operation of user interfaces should be understandable by all users, including those with cognitive or learning disabilities. This includes providing clear and consistent navigation, using simple and straightforward language, and ensuring that content appears and operates in predictable ways.

Robust

Web content should be robust enough to be interpreted reliably by a wide variety of user agents, including assistive technologies. This includes following coding standards, providing alternative content for older browsers or assistive technologies, and ensuring that content remains accessible as technologies evolve.

Best Practices

  • Provide alternative text for images, charts, and other non-text content.
  • Ensure sufficient color contrast between text and background.
  • Provide captions or transcripts for audio and video content.
  • Ensure keyboard accessibility for all interactive elements.
  • Provide clear and consistent navigation.
  • Use simple and straightforward language.
  • Follow coding standards and provide alternative content for older browsers or assistive technologies.

Relevant Resources

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