What petrol isn’t is blue. The greyish, greenish hue that shares its name with what in the US is known as gas, but isn’t a gas, is more likely to have gleaned the moniker from paraffin, a derivative compound. Or a sea bird called a petrel, which isn’t blue, either. It is, however, the favoured tone of recent times in interiors circles, and looks pretty sharp in clothing form, as demonstrated here. With its elevated takes on the bomber jacket, track jacket and sweatpants in the shade, TOM FORD’s luxurious pieces look, feel – and are – reassuringly expensive. Which is sort of like petrol these days, come to think of it.