Did you ever look up into the trees from ground level? What kinds of colors did you see? Yep, there were light and dark colors. Sky, black, gray, etc. That's why most camo's that we use are really stupid. No matter what they are all a big bolb of brown or gray or whatever a deer sees. Now throw in some light colors such as thet found in Preditor Fall Gray or ASAT and you got a different view of things. Same goes for fletching. White, yellow, chartreuse is just another hole in the leaves to let the skylight trhough.