2.3.1 Three Flashes or Below Threshold (Level A)
Table of contents
Nothing on a webpage should flash more than three times in a second.
What you need to know
- The terms “flashing” and “blinking” can mean the same thing. WCAG distinguishes flashing as content that can cause a seizure. Blinking refers to content that can be a distraction. The two can be the same if blinking occurs faster than three times per second.
What you need to do
- Limit or eliminate any flashing content.
- The point here is to severely restrict flashing content. Although there are exceptions that provide for automatic content, make your website as static as possible by default, with options to activate helpful automatic content.
Reference
Read the full explanation of success criterion 2.3.1 on W3.org.
Related Posts
1.1.1 Non-text Content (Level A)
Make sure images and other non-text elements on your website are accessible by including meaningful text alternatives (alt text).
1.3.1 Info and Relationships (Level A)
Structure your website so that content is read by a screen reader in the same way it's presented visually.
1.3.2 Meaningful Sequence (Level A)
Structure your website so that your content is presented in a logical order.