BMW paint codes normally have three digits, and sometimes have a slash followed by a fourth digit.
Paint code tags are normally placed under the bonnet on the drivers side inner wing within a small 'plaque'. The name of the car color is also on the same tag.
get the mobile touch up guys to scan the paint for a better match.
they will make it up for you and it is a far better option than the bmw touch up paint......
Best to get a touch up shop to match it for you. Stone chips won't blend in on a metalic finish you need to line up the metalic flakes with the others around them. Spraying the bonnet and wings is the best way to get a good finish.