Success Criterion 2.3.1
Conformance level A

Game With Strobe Effects and No Photosensitivity Mode

2.3.1 — Three Flashes or Below Threshold

Scenario

Setting

A bank's mobile money-transfer screen

What’s wrong

Canvas games with explosion/strobe effects above threshold and no photosensitivity mode.

Example

.alert-badge { animation: flash 0.2s infinite; } /* 5Hz */

Why it matters

People with photosensitive epilepsy and others sensitive to rapid flashing.

How to test

Review canvas game explosion/strobe effects with PEAT, and check for a photosensitivity/reduced-effects mode: above-threshold effects with no such mode fail.

How to fix

Nothing may flash more than 3 times per second above the general or red-flash thresholds. .alert-badge { animation: flash 1s infinite; } /* below 3Hz threshold */ Content must not flash more than 3 times per second across a large enough area to matter.

Outcome

On a bank's mobile money-transfer screen, this barrier is gone for people with photosensitive epilepsy and others sensitive to rapid flashing — they get the same result as anyone else here.

Who is affected