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Does button:hover have contrast requirements?

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From: Henry, Michael (IntelliDyne)
Date: Jun 7, 2017 12:55PM

Hello everyone,


I've been searching but with limited time, it's been difficult to find this answer.

Is there a requirement (or best practice) that the hover/focus state of a button (not text link) have some measurable, distinct contrast from its default state?


I know that a button's hover/focus state should look distinctly different than its default state, but is there a numerical requirement that I need to measure, as there is with text color vs background color?


thanks!

Mike