That is strange... Everything that's painted on my car is the same color--white. Your trunk and hood should match the rest of the car. It appears they were replaced at some point with parts from a white M3. I can't tell for certain from your pic, but do you have a carbon roof? If only the trunk and hood were replaced, it's possible your car may have had hail damage in the past, but that's just a guess.
On the underside of the hood there should be a factory sticker indicating what color your car should be. Might want to verify the engine compartment is silver while you're in there...
Where did you buy the car?