Unspecified in the
1952 Chevrolet Truck Data PDF from the GM Heritage Center files.
An original
1952 Chevrolet Trucks dealer sales brochure doesn't specify in writing wheel colors, but you can see in the artwork found in the brochure a wide variety of color choices.
I don't have a 1952 Chevrolet Truck Salesman's Data Book, but do have one for my '51. In it, the only reference to paint on wheels just gives colors for the "stripes". Otherwise the only other mention on truck colors is the overall truck color.
I'm guessing that the wheels would likely have been body color, with the specified complimentary stripe color.
I did notice that the 3600 and 3800 series trucks for the most part in the dealer brochure look to have "black" painted wheels. Possibly related to them being more of the "work-horse" models that got less attention to eye appeal.