Limit Blinking/Flashing Content
For help, contact: Karen Sorensen
Why this is Important
Any flashing/blinking content (especially content in red) can cause seizures in people with photosensitive epilepsy as well as other photosensitive seizure disorders, so it should be limited and used only when necessary.
Flashing content limits the ability of those with photosensitive seizure disorders to access your information.
How to Achieve this Accessibility Guideline
Flashing content should be limited and used only when necessary. Web pages that do contain flashing content, should limit the flashing to no more than three flashes per second and not use fully saturated reds in the content.
If you do have content that flashes/blinks more than three times per second, freeze the blinking content momentarily so it falls below the three times per second limit.
If you have a web video with a scene involving very bright lightning flashes (or other scenes with flashes), edit the video so the lightening doesn't flash more than three times in any one second period.