I am completely lost. I have a cool brown military-style jacket, but I don't know what to put underneath it. Looks kind of like this http://www.perryellis.com/content/eb..._A_default.jpg but in brown. It is cotton, not leather. It does not have a zipper; it has lapels. Yellow shirt? White-and-blue striped shirt? shirt of another shade of brown? Would black jeans work? or blue jeans?