On the matter of colour, things get more interesting. Not least because what counts as a neutral in our wardrobes (see navy and oatmeal) is rarely neutral when splayed across our bedroom walls. Accordingly, when colour expert Little Greene debuted its coveted juniper ash paint — a dramatic hue of greyish navy — it was snapped up by those looking to create a dark, brooding effect in their lounges. And later by Ikea, which has made it the chain’s go-to colour. As a paint colour navy is a zeitgeisty choice. As a sweater colour it’s as classic as they come.