2.3.1 - Three flashes or below threshold
The intent of this success criterion is to allow users to access the full content of a site without inducing seizures due to photosensitivity. Individuals who have photosensitive seizure disorders can have a seizure triggered by content that flashes at certain frequencies for more than a few flashes.
Ways to meet the criterion
Do not design content in a way that is known to cause seizures in people with photosensitivity. Ensure web pages do not contain anything that flashes:
- more than 3 times / second
- minimize the following aspects of the flashing object:
- colour contrast of flashing images
- speed of flashes
- amount of red colour in the images
As a general rule, none of the web content should be flashing.