Return to list of success criteria
2.3.1 Web pages do not contain anything that flashes more than three times in any one second period, or the flash is below the general flash and red flash thresholds. (Level A)Understanding Success Criterion 2.3.1
Note: Since any content that does not meet this success criterion can interfere with a user's ability to use the whole page, all content on the Web page (whether it is used to meet other success criteria or not) must meet this success criterion. See Conformance Requirement 5: Non-Interference.
Note: Other techniques may also be sufficient if they meet the success criterion.
Reducing contrast for any flashing content (future link)
Avoiding fully saturated reds for any flashing content (future link)
Reducing the number of flashes even if they do not violate thresholds (future link)
Providing a mechanism to suppress any flashing content before it begins (future link)
Slowing down live material to avoid rapid flashes (as in flashbulbs) (future link)
Freezing the image momentarily if 3 flashes within one second are detected (future link)
Dropping the contrast ratio if 3 flashes within one second are detected (future link)
Allowing users to set a custom flash rate limit (future link)