About my comment on colours:
I do not know much aobut how the animal sees, but some hunters use blue clothes.
What colour sees an animla when is looking at the sky? isnt blue?
The zarco is a blue camo produced in South africa: http://www.safetycamo.com/

"Zarco™ Safety Camouflage increases your visibility to other hunters while you remain inconspicuous to animals such as antelope, deer and buck. As with most modern camouflage materials available today, the profile of the hunter is scattered against the natural background however Zarco™ Safety Camouflage patented vision deception technology ensures that you can enjoy the benefits of getting really close to your target while at the same time reducing the risk of being mistaken for game by other hunters."}
http://www.safetycamo.com/images/index_01.jpg

Martin