Three Flashes (2.3.2 – Level AAA)

No content flashes more than three times per second.

Introduction

Flashing content on a website can cause difficulties for users with photosensitive seizure disorders such as epilepsy. Flashing content can cause these users to suffer a seizure.

How to Pass ‘Three Flashes’

Don’t add anything to your website that flashes more than three times per second.

‘Three Flashes’ Tips

Remember, flashing is different to blinking (see Pause, Stop, Hide). Blinking can distract users but doesn’t cause seizures. 

If blinking content occurs three times per second, it is considered flashing content.

This removes the exception from Level A in Three Flashes or Below Threshold.

See Also

• Pause, Stop, Hide
• Three Flashes or Below Threshold
• Understanding Success Criterion 2.3.2 (W3C)