Well, a blazer is typically a solid color garment with gold buttons. A wonderful summer look, in my opinion, especially when paired with a french blue shirt and khaki colored dress trousers (as per the picture in A Night Out in DC). It also looks good with light grey trousers. I recommend a navy DB, the most classic of all blazers, with flapped pockets and side vents. 6 buttons with two that function. If the lapel rolls gently around the top functioning button I think it looks best to button only the lower button.