Success Criterion 2.3.1
Conformance level A

Strobe Intro or Glitch Effect Above the Flash Threshold

2.3.1 — Three Flashes or Below Threshold

Scenario

Setting

A ride-hailing app's trip booking screen

What’s wrong

Any content flashing >3 times/second above general or red-flash thresholds: strobe intros, glitch effects, party GIFs.

Example

A tester reviewing a ride-hailing app's trip booking screen finds this: any content flashing >3 times/second above general or red-flash thresholds: strobe intros, glitch effects, party GIFs.

Why it matters

People with photosensitive epilepsy and others sensitive to rapid flashing. The practical effect on a ride-hailing app's trip booking screen: they run out of time before finishing the task.

How to test

Review any strobe/glitch visual effect (intro animations, transitions) with PEAT: flashing above the general or red-flash threshold fails.

How to fix

Nothing may flash more than 3 times per second above the general or red-flash thresholds.

Outcome

That one change on a ride-hailing app's trip booking screen means they keep up without being rushed or interrupted.

Who is affected

People with photosensitive epilepsy and others sensitive to rapid flashing.

Learn more

Understanding Understanding document (opens in a new tab)