So, I think most "camo" was a military invention to make you hard to see by other humans. Biologists and others tell me that there is a noticeable difference in "cones and rods" between human eyes and other mammal eyes - in other words, the camo is supposed to work to hide from human eyesight, not necessarily to hide you from another mammal. However, I think they are way more sensitive to motion than we are - even an eye blink or hand motion. And I think they are way past most of us when it comes to hearing or scent detection.
However, I think birds are much more sensitive to colours - I have seen geese flights "flare" because one guy in the group did not "match" to the slough grass that we were in. I have never stalked wild turkeys, but I suspect they are similar to goose eyesight.
It will be typical human arrogance to believe that every other critter sees the world the same way that we do, and many will find it incomprehensible that there are other "views of the world". Sales and Marketing people will make a decent living by "proving" to you how good their product is - but, making it less clear for a human to see you against a particular background is not the point - the point is to hide you from something that sees differently than you do - which will be almost impossible for you to verify in a store. I have had Whitetail deer within 10 feet (3 meters) while I was dressed in blaze orange from head to ankle - another guy from Esterhazy, Sask. used to "hunt" deer wearing bluejeans, T-shirt and baseball cap - he said he had deer within a "few feet" of the lawn chair that he "hunted" from.