Yes, that's not a problem, there are a lot of TPU cases with many different colours (but I wouldn't choose one that has a paint finish, they come off with the zet and that doesn't look very nice) that you can use for it. I would just make sure that the case itself is not too heavy, because the phone itself already has quite a bit of weight. The good thing about a case like this is that the device is also protected against damage from falls and still looks nice even after years.