Flashing – Accessibility Guidelines

Flashing is generally a bad idea. It can cause all sorts of issues, from seizures to motion sickness. If you absolutely must have a flashing element there are a few things to consider.

Testing #

• Failure at any step constitutes a 508 compliance issue

1. Look for elements that contain flashing
   • Scrolling or blinking text
   • Scrolling or blinking page elements
   • Videos that contain flickering or flashing
   • GIFs that contain flickering or flashing
2. Check if you can determine the frequency of “flashing.”
3. Check that the rate of flashing is less than 3 Hz (3 times a second), or scroll delay is set to >= 400.