ST170 alloy wheel colour

[DL-C]

Hi guys, just got an ST170 which I'm really pleased with. The bodywork wasn't great when I picked it up but a few hours graft with meguires product has made that better.
I've got the car booked in to get the alloys re-furbed on Monday. I know the centre caps are a polished chrome finish. Are the alloys just standard alloy wheel colour? Looked at loads of pics online and can't make my mind up!
Also if anyone has any of the centre caps lying about that are in good condition, I'll have them off you.
Thanks in advance