If the dress code is black and there are no other details then it's a traditional funeral and your shoudl wear traditional funeral clothing . That means smart, conservative and dark. Nothing tight or sexy, no short skirts , sleeveless tops , towering heels or plunging necklines . No evening wear, nothing shiny, lacy or sexy.
Most people are not trying to draw attention to themselves or give themselves a boost by wearing something makes them stand out . But if that what you want to do and you have the support of the chief mourners , then go for it .