I've read and heard that deer can distinguish blue. I'm reluctant to believe it. (On occasion, I have worn my buffalo plaid (blue and black) Filson jacket while hunting. Deer took no notice.)
Think about this. One of the brightest colors a person can wear is BLAZE ORANGE. I've had deer within several yards of me when I was wearing solid blaze orange. They looked directly at me and didn't know what I was because I was stock-still and the wind favored me.
I believe that hunters, particularly bowhunters, make way too much of camo, clothing colors, etc.
Mark