I think that the hair color of your character should also be the color of the werewolf form.
Hell no. A blond werewolf? Ha.
In my own little stories, my female werewolf(who is blond haired) is black in her werewolf form, and slightly muscular like in Skyrim(I love how Bethesda made their werewolves that matched her description). Now my black haired werewolf fellow is grey in his wolf form, or at least that is how I intended him to be.
I do hope we get a small werewolf makeover, but nothing too drastic. A few fur colors and thats it.