A track record of exceptional results

Principle

What it Means

Expectations from a Website

text alternatives, captions, contrast

Information and user interface components must be presented in ways that users can perceive.

Provide text alternatives for images, icons, multimedia.
Offer captions, transcripts, audio descriptions for media.
Ensure content is adaptable (can be presented in different ways without losing meaning).
Make text and visuals distinguishable (good contrast, resizable text, avoid relying solely on color).

keyboard support, navigation

User interface components and navigation must be operable.

All functionality must be keyboard accessible (not only mouse/touch).
Give users enough time to read and use content.
Avoid content that triggers seizures (flashing, strobing).
Provide navigable structures: clear headings, labels, consistent navigation, skip links.

readable, predictable, error handling

Information and operation of the user interface must be understandable.

Text must be readable and understandable (clear language, defined abbreviations).
Pages should behave in predictable ways (consistent navigation, no sudden context changes).
Provide help and error handling (clear error messages, input guidance, form validation).

valid HTML, ARIA, assistive tech

Content must be robust enough to be interpreted reliably by a wide variety of user agents, including assistive technologies.

Use clean, valid HTML and code so assistive tech can interpret it.
Ensure compatibility with current and future tools (screen readers, browsers, devices).
Provide proper labels, roles, and states via semantic HTML or ARIA when needed.

Web accessibility principles