WCAG 2.2 Accessibility: CSS Best Practices for Inclusive Design

Web accessibility isn't optional. It's essential. CSS plays a crucial role in creating accessible experiences that work for everyone, including users with disabilities.

Why Accessibility Matters

• 15% of the world population has some form of disability
• Legal requirements in many countries (ADA, Section 508, EAA)
• Better UX for everyone - accessibility improvements benefit all users
• SEO benefits - accessible sites rank better

Color Contrast (WCAG 2.2 Level AA)

Minimum Requirements

• Normal text: 4.5:1 contrast ratio
• Large text (18pt+): 3:1 contrast ratio
• UI components: 3:1 contrast ratio

.button {
  background: #0066cc;
  color: #ffffff;
}
.button-bad {
  background: #7a7a7a;
  color: #999999;
}

Testing Tools

Use our Gradient Generator with built-in contrast checking, or:

• Chrome DevTools
• WebAIM Contrast Checker
• Lighthouse accessibility audit

Focus States

Never remove focus outlines without providing an alternative.

button:focus {
  outline: none;
}
button:focus-visible {
  outline: 3px solid #0066cc;
  outline-offset: 2px;
}
button:focus-visible {
  outline: 3px solid #0066cc;
  outline-offset: 2px;
  box-shadow: 0 0 0 4px rgba(0, 102, 204, 0.25);
}

Motion Preferences

Respect user preferences for reduced motion:

.card {
  transition: transform 0.3s ease;
}
.card:hover {
  transform: translateY(-4px);
}
@media (prefers-reduced-motion: reduce) {
  .card {
    transition: none;
  }
  .card:hover {
    transform: none;
  }
}

Screen Reader Considerations

Visually Hidden but Accessible

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

Skip Links

.skip-link {
  position: absolute;
  top: -40px;
  left: 0;
  background: #000;
  color: #fff;
  padding: 8px;
  z-index: 100;
}
.skip-link:focus {
  top: 0;
}

Text Spacing

Users must be able to adjust text spacing without loss of content:

p {
  line-height: 1.5;
  letter-spacing: normal;
  word-spacing: normal;
}
@supports (line-height: 1.5) {
  p {
    line-height: max(1.5, 1em);
    letter-spacing: max(0, 0.12em);
    word-spacing: max(0, 0.16em);
  }
}

Touch Targets

Minimum 44x44px touch targets:

.button,
.link {
  min-width: 44px;
  min-height: 44px;
  padding: 12px 16px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

Dark Mode Accessibility

body {
  background: #ffffff;
  color: #1a1a1a;
}
@media (prefers-color-scheme: dark) {
  body {
    background: #1a1a1a;
    color: #f5f5f5;
  }
}
@media (forced-colors: active) {
  .card {
    border: 1px solid;
  }
}

Common Mistakes to Avoid

Testing Checklist

• Keyboard navigation works everywhere
• Focus indicators are visible
• Color contrast meets WCAG AA
• Animations respect reduced motion
• Touch targets are at least 44x44px
• Text can be resized to 200%
• Works with screen readers

Conclusion

Accessibility is an ongoing process, not a checkbox. Start with these CSS foundations and test with real users and assistive technologies.