Non-standard: This feature is non-standard and is not on a standards track. Do not use it on production sites facing the Web: it will not work for every user. There may also be large incompatibilities between implementations and the behavior may change in the future.
-webkit-tap-highlight-color is a non-standard CSS property that sets the color of the highlight that appears over a link while it's being tapped. The highlighting indicates to the user that their tap is being successfully recognized, and indicates which element they're tapping on.
-webkit-tap-highlight-color: red; -webkit-tap-highlight-color: transparent; /* for removing the highlight */
-webkit-tap-highlight-color = <color>
Not part of any standard. Apple has a description in the Safari Web Content Guide.
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