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. 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.

See Also

Free Developer Resources

Join over 3,700 subscribers on my weekly web accessibility email and get free developer resources like WCAG Checklists and special offers.

Powered by ConvertKit

Over 600 developers like you have learned more about the Web Content Accessibility Guidelines with my guidebook.

Learn more >

About Author

I'm Luke, I started Wuhcag in 2012 to help people like you get to grips with web accessibility. Check out my book, 'How to Meet the WCAG 2.0'.

Leave Comment