Kit colours for clubs in established leagues would have been chosen and set 100 odd years ago, in the days when refs wore one colour and clubs would travel with one kit (and hope there hadn’t been a mixup on telegram).

Away kit colours change a lot, home kits rarely do. Plus there are third kits now so if all black wasn’t suitable they can wear that.

Very true. Villa and Brighton are showing gradual improvement season on season. Leicester were relegation candidates.