Families like green space and blue space. After a hectic week in the home, the office and the school, they need calm. In hot weather, families want to picnic on the grass, not far from a car. In cool weather, they want exercise and places for children to exercise their expensive toys (bikes, boats, models etc.). They like green space. This explains why the heads of households, when working as planners and designers, tend towards the belief that green is the paramount colour for outdoor planning.