Posh people seem to worship at the shrine of black and white, possibly because it looks neat and smart while cleverly negating the issue of whether they are any good at colour-coordinating their clothes, which they often aren't, because they grew up on their country estates layering jumpers over dresses over jeans in a haphazard way quite peculiar to the posh, and it was only when they got their first fashion job in London that colleagues pointed out they looked a little crazy.