Autumn decorating works best when a room feels like it has quietly changed with the season, not dressed up for a single day. A warmer cushion, a bowl of russet apples, a candle beside a stack of books, or a few branches in a stoneware jug can shift the whole mood. The magic is in the colour. Autumn gives you a rich but forgiving palette: baked terracotta, chestnut brown, ochre, olive, plum, cranberry, cream, soot black, soft gold. These shades bring depth to a room without ma