The perspective that a lot of the most esteemed dressers of the early to mid 20th were serenely Appollonian in their choices probably does owe much to the accidental congruence with the hegemony of black and white photography.
When you see one of these "classic" photos, as promoted by dudes like Boyer in his books, pop out in a color version, it becomes easier to understand that riotous color was even more ascendant then than even today in the age of cheap dyes.
I saw one recently of Gary Cooper, the B&W version of which is widely known. You would never have guessed the colors...yeow!
This is what's particularly enjoyable about Boardwalk Empire (even if little else is these days). Apparently the show's costume designer (in collaboration w/ Martin Greenfield) pretty faithfully recreates period-accurate garments, using vintage textiles from the era. A lot of the looks on that show would feel right at home on, say, LabelKing. Some would fit neatly into the framework of this thread.