US Army? Some of the colors were all over the wall. 2AD out of Hood used a desert sand color that looked darn right pink. Many of the 1st Tiger Brigade, 2AD's wheeled vehicles were still in this shade when they became the 3rd Greywolf Brigade, 1st Cavalry Division.
Most of the units used a yellower desert sand that flaked and chipped off of the NATO 3-color underneath. Testors Model Master Modern Desert Sand is a good match in spray can and in small bottles.