Web accessibility is often treated as a checkbox exercise — something to address during a final audit before launch. This approach is fundamentally flawed. Accessibility is not a feature; it is a quality attribute that should be woven into every stage of the development process, from initial design to deployment and beyond.
The business case for accessibility is compelling. Over one billion people worldwide live with some form of disability, and this population controls trillions in discretionary spending. Beyond the moral imperative, accessible websites perform better in search engines (Google rewards accessible design), have broader market reach, and often provide a better experience for all users, not just those with disabilities.
Semantic HTML is the foundation of web accessibility. Using the correct HTML elements — headings (h1-h6) for content structure, buttons for actions, links for navigation, landmarks (nav, main, aside, footer) for page regions, and proper form elements — provides a meaningful structure that assistive technologies can navigate. A common mistake is using divs and spans for everything and adding ARIA attributes to compensate, when native HTML elements would have been more appropriate.
Keyboard navigability is non-negotiable. Many users — including those with motor impairments, screen reader users, and power users who prefer keyboard shortcuts — navigate websites entirely without a mouse. Every interactive element must be reachable via the Tab key, activatable with Enter or Space, and have a visible focus indicator. Skip-to-content links provide a way to bypass repetitive navigation and jump directly to the main content.
Color contrast requirements exist for good reason. The WCAG 2.1 AA standard requires a minimum contrast ratio of 4.5:1 for normal text and 3:1 for large text. Tools like the Chrome DevTools contrast checker make it easy to verify compliance during development. Remember that color should never be the sole means of conveying information — always pair color changes with text, icons, or patterns.
Testing for accessibility should be an ongoing practice, not a one-time event. Automated tools like axe, Lighthouse, and ESLint accessibility plugins catch many common issues, but manual testing is essential. Try navigating your site with only a keyboard. Use a screen reader (VoiceOver on Mac, NVDA on Windows) to experience your site as a visually impaired user would. These experiences are eye-opening and will immediately reveal issues that automated tools miss.