OP, I don't believe there is a paint code. Your best bet to match is to go to Prismatic Powders (online), order a bunch of free samples, and try to match through a swatch and then get the wheel stripped and powder coated.
You're not going to be able to match the satin finish with regular paint.
mine are that "grey color" also but have had a hack of a respray and refinish on two of the wheels. They look awful.
Im now swinging towards powder coat and gloss black...and then doing my own "black package with the rest (mirrors..hood snouts..badging etc"
Im also leaning towards the vuclan wheels in 2 tone look...a very light gold face and black drum.....on a white car.
when i went to my powder coater there are quite a few shades that are close to that stock color. Best if you go there and take the sample swatch out side and compare...
actually the dark grey that tesla uses looks really good. you can google that wheel color.
This is my idea.....channeling this Aston i saw a while back.(jus not as a rich or dark of gold)
Vegas... what do you mean they look awful ?? ...do you have any pics ???? .
they were touched up with a spray can i think..then various bad cleaners on them. One area has a small 3 inch area of curb rash on the rim lip. Im getting that all addressed with the powder coating..