It appears that the F8F wheel wells were painted the same color as the exterior with the exception of some hardware located in the well (there was apparently no specific requirement as to wheel well color until they were to be painted white in the mid 1950s).
Although these are grey-scale pictures (the second one has been lightened considerably) and the color pictures I have aren't conclusive because the wells are in shadow, that's the way to bet.
However, some of the very early F8Fs had the accessory section (viewed from the inboard wheel well) painted with either a metallic color or zinc chromate.
The two different wheel hubs are distinctive. The early ones had "spokes" and might be either blue, "black" (cosmoline?) or metallic (in this case, on the drop test article, probably unpainted).
The later wheel hubs were forged, possibly introduced with the F8F-2 and similar to the hubs on the F9F Panther.
They were usually a metallic color.
For some other of my posts on the F8F, see
(also includes a plug for the excellent Meyer/Ginter monograph on the F8F)