What is the 60-30-10 colour rule? Rebalance a room and see

Three colours used equally can make a room feel restless. The 60-30-10 rule is a decorator's rule of thumb that gives them unequal jobs: about 60% main colour for walls and big pieces, 30% support for curtains and chairs, and 10% accent for cushions, lamps and art.

Recolour a small living room, tap each item to change its role, and watch the bars show whether it feels calm, flat or busy. Plus how to use what you already own, and when to break the rule.