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This is not a world altering thing. But it is something like Neil Armstrong wearing red socks to the moon. It isn't big, but it is interesting how white socks became passe in that universe and red came into fashion. Dark blue and black suits are the accepted colors for what a politician wears in a two or three piece suit. It's hard for a politician to wear anything other than those colors. When Obama wore a beige suit, for example, people went a little wonky. I can't think of another politician than Reagan that has pulled off any color but dark blue and black. Ironically, he also wore beige and brownish suits (and this, once out of office).
So the challenge is to get politicians into other colors as acceptable, and even other types of professional clothing. It could be suits of traditional colors politicians just don't wear, like beige, brown, and grey. Or you could argue for more exotic colors, which are fashionable but not political, such as purple. As well as different modes of professional dress. Lord knows when the hipsters come of election age, this may be the future anyway.