Heres a little something I found just doing some looking tonight..
Are Black and White Toys Important For Visual Stimulation?"
Many modern stores that sell clothing, toys and accessories for infants and children carry items decorated with large, geometrical black and white patterns. Infants reflexively prefer to look at high-contrast edges and patterns. Large black and white patterns present the highest possible contrast (100%) to the eye and thus are the most visible and attractive to babies. But are high contrast patterns the only things infants can see?
It is true that objects with patterns having 100% contrast (that is, black-on-white) are the easiest for newborns and young infants to see. However, it is now known that they can distinguish much subtler shades of gray. For example, in the first month babies can distinguish two shades of gray that differ by only 5% in gray level (5% contrast). As good as that is, by 9 weeks of age, infants' contrast sensitivity becomes 10 times better, so that they can see large patterns or objects that have less than 0.5% contrast. This is nearly as good as adult contrast sensitivity (0.2%). This means is that by about 2 months of age your baby is capable of perceiving almost all of the subtle shadings that make our visual world so rich, textured and interesting: shadings in clouds, shadows that are unique to your face; even see a white teddy bear on a white couch!
"When Can My Baby See Colors?" or, as some parents exclaim, "My Baby 'Likes' Red!"
Parents often say their baby prefers a certain color, often bright red or blue. Unfortunately, it is very difficult to tell what colors a baby prefers, or what colors he or she can see by simply noticing what he or she looks at. This is because their eyes might be attracted by the brightness, the darkness, or the contrast of an object against its surroundings, and not by the color alone. Recent studies at the University of California in Berkeley have shown that infants as young as 2 weeks of age have color vision and can distinguish a red object from a green one even when these are perfectly matched in brightness. Infants' color vision is not likely to be as rich and sensitive as adult color vision since the receptors and nerves in the eye that are most sensitive to color (again, in the fovea) are not yet mature. Thus, infants may not be able to distinguish very subtle color differences (like distinguishing between red and reddish-orange, or between very subtle pastel colors). However, they can see colored patterns as well as black and white patterns as long as the patterns are not too small and have enough contrast (difference in color or brightness).
But what about those black and white mobiles? Well, all this research tells us that a normal visual environment without black and white toys is quite rich and stimulating to your baby. This also means that anything pleasing to you is appropriate to decorate your baby's room. As far as the black and white toys are concerned, they may be highly visually attractive; but they are not visually necessary! That is, unless your baby were to have some visual problem, these toys are probably not necessary to promote normal visual development. In fact, you might consider giving your baby a rest from the black and white toys so that he or she can explore more subtle, and perhaps more important objects (like your face and eyes, or his or her own hands and feet).