Paint my Lip, need some HELP- Paint color/code

[M3X]

I am getting the CSL s put on the car soon and I was looking to paint the front Lip to match with thte wheels.

So I was going with one these colors, either:

1- Black mid gloss
2- Gunmetal- Dark gunmetal; something like the older M5 wheel color- Which is my better choice

Problem is I went to the body shop the guy told me to come up with the paint code and then they got from the !

But do not know of any codes - can anyone help me out here?