The colour of sun-warmed roofs and terracotta planters, Burnt Sienna, as a clay colour, was one of the first pigments to be used in art, and so imparts real depth and comfort on an interior. As spicy and as earthy as it is though, it also has a lightness to it – a colour that can create airy spaces as much as it can cosy ones, depending on the other hues you combine it with.