CSS Accessibility

Last reviewed May 28, 2026 Content v20260528

This lesson

This lesson teaches CSS Accessibility—the ideas, syntax, and habits you need before moving on in CSS.

Accessible markup and styles are a legal and UX requirement on professional web teams.

You will apply CSS Accessibility in contexts like: All browser UIs, component libraries, marketing sites, and many native apps that reuse web views.

Read the lesson, edit HTML/CSS in the playground, press Run to preview, then answer the lesson MCQs.

When intermediate lessons feel comfortable and you are ready for production-style trade-offs.

Accessible CSS ensures interfaces remain perceivable and operable across visual, motor, and cognitive differences.

outline: none without replacement is one of the most common accessibility regressions.

Q: Fastest manual a11y CSS test?
A: Keyboard tab through controls and verify visible focus at 200% zoom.
Q: Why handle reduced motion in CSS?
A: Some users are motion-sensitive; respecting preference improves comfort and safety.
Q: Contrast-only concern for text?
A: No, controls/icons/states also need sufficient distinguishability.

Pitfall: Check cascade order—author stylesheet loses to inline styles and !important surprises.

Can you explain this lesson in 30 seconds without reading notes?

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