Given the detail in this show, every knot and article of clothing is intentional. There is a 1974 feel to some of Hannibal's suits and furniture. I believe there are 2 reasons behind this. First, his style is non-conforming, highlighting his non-conformity with society. Second, I suspect they are attempting to set a tone for the future; to break the current crisp blue and white corporate garb. Just a hunch.