Do all years of Advance-Design Panel trucks have brown upholstery?

1954/55 had brown upholstery in regular production conventional cabs and panels to match the new Pearl Beige standard interior color. The standard Suburban had gray and maroon upholstery, as did the optional deluxe interior on all other 54/55 trucks.

Does anyone have any documentation regarding upholstery color in 47-53 Panel trucks (Restoration Pack Specifications manuals don't seem to have information on interior/upholstery colors)?

I think I have some 1953 Panel seats with some original upholstery (that have been in storage since the mid 70s) - I'll try to check tomorrow.