If you look on the VIN plate in the front boot

(its on the bulkhead at the front of the car, look into the front boot towards the radiator) you will find the paint code for your car, it will be in the form of 3 or 4 letters numbers and letters, ie mine is 3E5 which is Super RED II, I'm not sure of the code for silver but it should be something like 141 or possibly 150
HTH

Jimi