Both PPG and Sherwin-Williams list paint codes online. The factory code is YFKC with 6389 as an alternate code. The PPG code is 37012. I was hoping to find an aftermarket match for the paint, since a pint of the stuff is more than I need and I'm not interested in buying a paint gun. The pre-packaged DupliColor paints that I tried ended up being too dark.

After wasting more time and money than it would have taken to have the wheel professionally refinished, I ordered paint from an online retailer that provides it in a handy spray can. I'll post the results after I've had a chance to try it.