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The WCAG principle called Perceivable states that information and user interface components must be presentable to users in ways they can perceive. This principle is all about providing alternative methods of understanding your web content. If users canโt see your content, for example, let them hear it.
WCAG Perceivable Principle
Text alternatives
Captions and transcripts
Use semantic HTML
Portrait and landscape orientation
Sufficient color contrast
Combine multiple visual cues, not just color
Avoid autostarting audio or video
Responsive body copy
Legible at 200% zoom
Further reading
Closed captioning resources
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