I'm going to answer with more information than you asked for, since this question may involve 3 different camo scheme "eras." In general, regardless of the era, wheel rims were painted as an extension of the largest color shade appearing on the body above it. This practice goes back to the first camo scheme appearing in late-1970's, called MERDC. It's a 4-color scheme with a proportion of 45% / 45% / 5% / 5% in color fill, which allowed the rims to be only one of the two dominant (largest percentage) color shades, whichever shade was directly on the body above. This rule applied to all sizes/types of tactical vehicles, wheeled and tracked. It was pretty much standard to see different-colored rims (and wheels on armor) on the same side of a vehicle in the MERDC era.
By the 1980's when CARC paint came out, the same practice was followed. This means that wheel rims painted black or any other shade of the non-dominant colors were not seen up to this point. However, later, when the 3-color camo scheme appeared, the rims took on the color above it, no matter the color. Such as black, brown, green, whatever. This practice was mostly seen on larger wheeled vehicles, some examples of such I own still wearing the different examples they left the DRMO in. I stand corrected it was not always the case for the m1008/9.
There were exceptions to this practice, such as seen when tires were swapped from a different location on a vehicle, or after a flat tire when what had been "the spare" did not match the color above it. I remember certain IG inspections in the late-70's to late-80's being anal about rims matching the color above. If they didn't match, we had to rotate tires until they did, which made for a long hot day in the motorpool.
A vehicle painted one solid color retained the same shade on its rims, as was practiced in the pre-camo days. I do stand corrected that this former practice did not always include the m1008/9.
TC5-200 was the first "TM" we got on camo when I was in. In early years we were given paintbrushes to camo a truck when work was slow. A bigger horror was when we were told to use paintbrushes to touch up damaged spots on the camo of otherwise professional-quality sprayed vehicles. But I will say brush-painted 4-color on M48A5 tanks looked rather tough and rough in a good way, like the shell of a painted turtle. A clean, perfectly-painted unscarred tank just didn't look right to me. Here's an interesting link about the "history" of CARC etc ;
https://www.pcimag.com/articles/95385-modern-carcs-for-military-protection
and I think there's been plenty of posts about the patterns used on your vehicle