ActiveStyle
is an option for Hyperlink and related constructs that specifies styles to add when the constructs are active, typically as a result of the mouse being over them.
Examples
Wolfram Research (2008), ActiveStyle, Wolfram Language function, https://reference.wolfram.com/language/ref/ActiveStyle.html.
Text
Wolfram Research (2008), ActiveStyle, Wolfram Language function, https://reference.wolfram.com/language/ref/ActiveStyle.html.
CMS
Wolfram Language. 2008. "ActiveStyle." Wolfram Language & System Documentation Center. Wolfram Research. https://reference.wolfram.com/language/ref/ActiveStyle.html.
APA
Wolfram Language. (2008). ActiveStyle. Wolfram Language & System Documentation Center. Retrieved from https://reference.wolfram.com/language/ref/ActiveStyle.html