Designing for Accessibility (a11y): Best Practices for Modern Websites

An accessible website ensures that all users, regardless of physical or cognitive abilities, can browse your content without friction.

1. Semantic HTML

Use semantic markup like <header>, <nav>, <main>, and <footer> instead of generic nested divs. Semantic tags provide structures that screen readers rely on to read content correctly.

2. Ensure Adequate Color Contrast

Text must contrast clearly against the background. According to WCAG 2.1 AA requirements, normal text must have a contrast ratio of at least 4.5:1, and large text must have at least 3:1.

3. Implement Proper keyboard Focus Indicators

Users who navigate using keyboards rely on visual focus outlines. Never set outline: none without supplying a clear custom focus state in your CSS:

.btn-primary:focus-visible {
    outline: 3px solid #4f46e5;
    outline-offset: 2px;
}

Conclusion

Designing with accessibility in mind is not only ethical, but it also improves search engine crawlers' ability to read your site, which boosts overall SEO performance.