Success criterion 2.3.1
Three Flashes or Below Threshold
Web pages do not contain anything that flashes more than three times in any one-second period.
- Level A
- Principle 2: Operable
- Guideline 2.3: Seizures and Physical Reactions
In a user’s words
“Wow, that flashing ad is like a rave party for my eyes. Can we not?”
What each role can do
- Product manager
- Avoid incorporating flashing elements into the product's design.
- Designer
- Design static, non-flashing user interface elements for a more inclusive experience.
- Developer
- Ensure that no elements on the page flash more than three times in a one-second period.
- Tester
- Conduct tests to identify and eliminate any flashing elements that exceed the threshold.
Once it is fixed
“Thanks for cutting the disco lights. My eyes and my brain appreciate it!”
Share this with your team
The quotes are written to illustrate the criterion. They are not testimonials from real people. For the official wording, find 2.3.1 in the W3C quick reference for WCAG 2.2 (opens in a new tab).
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