The tartan called US Army is clearly based on one man's service and is not representative of the Army broadly.

I've been slowly working toward a pattern that does represent all of the Big Green Machine. (Is it really green anymore?) Someday it will actually be ready for weaving. When that day comes I'd like to make it a restricted tartan and assign the rights to it to Army Emergency Relief. Other tartans, Wildcat immediately comes to mind, are restricted with chareties given the right to have them woven. How does this work? How can we be assured the fee due the charity actually wind up in the right hands. What needs to be done to help a charity not familiar with the tartan weaving business get the information needed to manage their end of the process?

As for the actual pattern the basic colors will be the shades of blue of the current Army dress uniform, or the blues of the Civil War uniforms if they might make for better contrast between the two blues. The army uniforms were blue from 1779 up until the early 20th Century when Khaki was adopted for every day wear, and blue became the dress uniform color So, even though the Army is going to be wearing a new green uniform as the everyday equivalent to a business suit, blues will always be the key colors for the service.