Accessibility in Web Design: Why It Matters and How to Do It
Web Accessibility Is a Business Imperative
Over 1 billion people worldwide have disabilities. When your website isn't accessible, you're excluding 15% of the global population from becoming customers. Beyond ethics, accessibility improves SEO, user experience for everyone, and protects against legal risk.
WCAG 2.1 Guidelines
The Web Content Accessibility Guidelines (WCAG) provide the standard framework. Focus on the four principles: Perceivable, Operable, Understandable, and Robust (POUR). Aim for Level AA compliance as a minimum.
Perceivable
All content must be presentable in ways users can perceive: alt text for images, captions for video, sufficient colour contrast (4.5:1 for normal text), and content that works without colour alone conveying meaning.
Operable
All functionality must be operable via keyboard, touch, and assistive technology. This means logical tab order, visible focus indicators, skip navigation links, and no interactions that require precise mouse movements.
Common Accessibility Fixes
The most impactful fixes are often simple: add alt text to images, ensure form labels are properly associated with inputs, use semantic HTML elements, maintain heading hierarchy, and test with a screen reader.
Accessibility and SEO
Many accessibility best practices directly improve SEO: semantic HTML helps search engines understand content structure, alt text provides context for image search, and good heading hierarchy signals content organisation. Accessible sites tend to rank better.
Testing Accessibility
Use automated tools (axe DevTools, Lighthouse) for initial audits, but don't stop there. Manual testing with keyboard navigation and screen readers catches issues that automated tools miss. Include accessibility testing in your regular QA process.