Salt and Pepper. Laurel and Hardy. Ham and Eggs. Strawberries and cream. All great partnerships, together in perfection. And when it comes to colour combinations, the classic, the epitome of the perfect combination has to be black and white. Just this week, supermodel of the moment Gigi Hadid, showed how classically elegant black and white can be, teaming a white silk blouse and cigarette pants with strappy cage heels. The look was both timeless and current and showed why this is one style combination that will never go out of fashion. As well as Gigi, many other style icons and celebrities have recently ignored the lure of a colourful wardrobe…