Compensate for bolder primary colors in a girl's room by thinking in delicate detailing. The embroidered look of these elephants adds a perfect balance and subtle touch to beautiful white; and adding one meaningful animal rather than a slew of stuff in the crib keeps it simple.
This image shows the above nursery with the settee from another angle. With fewer rather than more items placed in a room, the eye is led to the details. And what my eye sees here is a sweet monkey peering down on the parade of monkeys.