At Herman Miller, we have the power and responsibility to ensure everyone has access to what we create regardless of ability, context, or situation. When we do this, more people can connect with our products and ideas. That's good for people and our business.
An accessible web experience must be perceivable, operable, understandable, and robust. These four principles, defined by the World Wide Web Consortium’s Web Accessibility Initiative, outline what to consider when developing a user interface and presenting information online.
People must be able to discern the information being presented to them—even if they don’t have all of their senses.
Offer text alternatives that serve the same purpose as non-text content.
Provide alternatives for time-based media including captions, audio descriptions, and transcripts.
Present content in various ways so assistive technology can interpret it without losing meaning.
Ease of Use
Make it easy for people to see and hear content.
Content and user interfaces must be accessible through assistive technology and should not trigger adverse reactions.
People should be able to access all functions with a keyboard. No actions should require specific timing or keystrokes. Individuals should have control over keyboard shortcuts.
Give people enough time to read and use content. Limit any automatic animation that lasts longer than three seconds. Make sure people can adjust or turn off the time limits and give them the option to postpone interruptions.
Avoiding Seizures or Physical Reactions
Avoid triggering seizures and physical reactions. Do not use content that has consecutive flashes or flashes that are below the red flash thresholds. Give people control over—and the ability to disable—motion and user interface animations.
Make it easier for people to input information with devices other than the keyboard.
People must be able to understand how to operate the user interface and clearly interact with the content.
Make text readable and easy to understand. Avoid using idioms or jargon. Ensure that the text is comprehensible to all reading levels.
Ensure that content appears and operates in predictable ways. Navigation and context should be consistent and any change of context should requested by the user.
Help people avoid and correct mistakes. Assist people by identifying errors and providing input instructions.
People must to be able to access content as technology advances.
Maximize content compatibility with current and future technologies.
Understanding the Four Principles
A brief introduction to the four principles of accessibility
A project to develop readability standards led by Content Design London