Why calm rooms have one boss colour: the 60-30-10 rule

Calm rooms often have one boss colour. The 60-30-10 rule is a designers' rule of thumb: about 60% main colour, 30% a supporting colour, 10% a bold accent.

Play with the proportions in a little room, see why the eye settles (or doesn't), and learn how to use it with what you already own, even if you rent. It's a guideline, so we also cover when to break it.