I don't mind that look if you have the hard top on. Should you never use your hard top or don't even have one, I would paint the hub caps body colour.
Given that most people, including 113 owners, won't even know this small fact, your car will look like someone grabbed your hubs caps so you stuck something else on to cover the wheels. For the most part, they look out of place on a car that has a totally diffrent colour than the caps.