At what age do children develop good color perception?
The visual system of infants is still developing after birth. It is difficult to say exactly how long it takes color vision to become “normal”, but by about 6 months of age the visual system is essentially the same as an adult. More significant, probably, is that visual acuity improves rapidly during those first six months and stimulation of all types from the visual world does aid in this early development. Here is a link to a good page on infant vision.