Accessible Publishing Knowledge Base
Category:
Accessibility Conformance
-
WCAG
Three Flashes
About
| Version: | WCAG 2.0 and up |
|---|---|
| Number: | 2.3.2 |
| Level: | AAA |
| Applicability: |
|
| Requirement: |
Web pages do not contain anything that flashes more than three times in any one second period. |
| Guidance: | |
| Techniques: |
Purpose
The purpose of this success criterion is to ensure that photosensitive readers are not put at risk of seizure when reading digital publications.
How to Meet
This success criterion differs from 2.3.1 Three Flashes or Below Threshold in that authors must ensure there is no content that flashes more than three times per second without exception.
Additional Information
The following knowledge base pages provide more information about how to address this success criterion for publishing content:
Applies To
| EPUB 3 | EPUB 2 | Audiobooks |
|---|---|---|
| Yes | Yes | Partial * |
* Applies to the table of contents and any supplementary HTML resources.