Yellow had its moment. But let’s face it; it was a just a moment, albeit it a lovely buttercup meadow in August kind of experience. But the fact is that too much of the mad, in-your-face yellow so beloved by 1980s decorators makes your retinas sting. And unsettles your soul. But conversely citrine – yellow with a dash of calming green  – makes your mouth water. Proof lies in harlequin’s delicious new Lucerne wallpaper from the Folia Collection. £48 for ten metres of unalloyed happiness. Citrine rocks. Citrine is here to stay.