Three Flashes or Below Threshold (2.3.1 – A)

Plain Language Recommendations

Page content must not flash more than 3 times per second unless that flashing content is sufficiently small and the flashes are of low contrast and do not contain too much red. (See general flash and red flash thresholds.)

Examples

  1. Consider an animation of an explosion.

WCAG 2.0 Recommendations

Guideline 2.3: Seizures

Do not design content in a way that is known to cause seizures.

Last updated: April 27, 2017
Category: Accessibility Recommendations, Accessibility Standards - List View, Media

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  • Key Terms

    1. Must means do things in the manner described exactly.
    2. Should means do things in the manner described unless there is a good reason not to [i.e., instructor has other needs].
    3. [Supplementary information] is provided in square brackets.