Pastel and glib or orange and high-vis, it is almost invisible in a chemical cocktail and strangely visible – but unreachable – in an equation etched into glass. It is a dog unleashed on the grass and a man going about measuring the Earth. It can be heard at the end chemotherapy and in a conversation in
the kitchen while a boy drowns in the harbour outside. It wears a pink T-shirt, spins with sycamore seeds and spends a whole poem finding a yellow it can live with.