The WCAG Primer is intended for use by the UK cross government accessibility community.

2.3.1 Three Flashes or Below Threshold (A)

Understanding 2.3.1 Three Flashes or Below Threshold (A)

A page must not contain content that flashes more than three times a second. This ensures that people with conditions like photosensitive Epilepsy are protected from harmful seizures.

Requirements / What to do?

• Content does not flash more than three times a second.

Common mistakes

• Content flashes at more than three times a second.

Useful resources

• TBC