[Mike V. Florida]

It's your car and you can paint them any color you want. I'm sure if a customer wanted the wheels painted a different color they would have done so (as with commercial customers wanting passenger cars in 1931). BUT if you want to have what the FACTORY sent out;

WHEEL COLORS
Prior to June 1930, wheels were dipped in gloss black
enamel. Colored wheels, beginning in June 1930,
were available as an accessory (judged in this area)
on all passenger vehicles except the DeLuxe Roadster,
DeLuxe Phaeton, Conve11ible Sedan, DeLuxe Tudor
and DeLuxe Fordor (160-C) which were equipped with
colored wheels as standard equipment. Ford specified
that colored wheels were first dipped in a base coat of black enamel, then
sprayed with a final color coat. The following colors were available:
June 1930 through June 1931: Black, Apple Green, Aurora Red, Orange, Tacoma Cream
September 1930 through June 1931: Black, Hessian Blue (on vehicles painted Lombard Blue)
After June 1931: Black, Apple Green, Aurora Red, Tacoma Cream