In a series that doesn't like to use the colors, it's time for a change.
Now, I know what some of you comic book nerds are thinking -- why isn't she wearing the traditional fishnets that have been part of the black canary character since seemingly forever? After all, they even made a joke about Laurel and fishnets back in season 1.
Answer: because fishnets make no sense on this show.
Also ... a night stick? Why a night stick? Um, because her father's a cop.
I like the look, and the wig makes a lot more sense in this context than it ever did with the other Lance sister, Sarah .... who was already a blonde ... but that was the only way to get the comic book color down correctly, I guess.