Even the plaster in here starts looking expensive next to deep green. That one dark triangle pulls the whole room together and gives a plain wall something to do all winter. Hang it in a living room where people gather, in a hallway that needs a bit of occasion, or above a sideboard you dress up in December. The red and gold dots do the work of decorations without any tinsel. Pair it with warm woods, cream walls, wool and a bit of brass. Skip the cartoon Santa signage and glittery slogan pieces nearby this one already carries the festive note, and clutter beside it turns a proper painting into a shop window. On premium fine-art paper, so the brushwork and specks of colour stay crisp.