What is Accessibility (a11y)?
Accessibility (a11y) is the practice of designing and developing software that can be used by people with disabilities, including visual, auditory, motor, and cognitive impairments.
Accessibility (a11y) is the practice of designing and developing software that can be used by people with disabilities, including visual, auditory, motor, and cognitive impairments.
Key accessibility standards: WCAG 2.1 (Web Content Accessibility Guidelines) at levels A, AA, and AAA. Most organizations target AA compliance. Section 508 (US federal government requirement). ADA (Americans with Disabilities Act, which courts increasingly apply to websites).
Practical accessibility requirements: keyboard navigation (all interactive elements reachable by keyboard), screen reader compatibility (correct ARIA attributes, semantic HTML), color contrast (4.5:1 minimum for normal text), alt text for images, captioning for videos, and scalable text.
Accessibility is not a feature — it's a quality requirement. 15-20% of the global population has some form of disability. Inaccessible products exclude a significant portion of potential users and create legal liability.
Why It Matters
Accessibility is a legal requirement (ADA lawsuits increased 300% from 2018-2023), an ethical imperative, and a business opportunity (15-20% of users have disabilities). Build accessibility in from the start — retrofitting is 5-10x more expensive.
Frequently Asked Questions
What is web accessibility?
Designing and building websites usable by people with disabilities. Covers keyboard navigation, screen reader support, color contrast, alt text, and more.
Is accessibility legally required?
Increasingly yes. ADA applies to websites. WCAG 2.1 AA is the de facto standard. Accessibility lawsuits have increased 300%+ since 2018.
Related Terms
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