I did not think that even deer see orange. They can see aspects of blue, but I think there color vision is pretty limited. When it comes to elk movement and scent are the key. Watch some videos of muzzle loader hunts in Colorado and you will see elk feet from hunters in orange.
Nope, I've had deer look at me in Virgina, where your required to wear a jacket, gloves, and hat, and then put their head back down and start feeding. And Im talking
We have had both deer & elk within 5 feet of us while wearing orange vests. But we also wear Camo Orange and go the extra step of using a UV wash along with scent free wash. Science or not it works. Good Luck
I had a bull come up on me to within 11 steps when cow calling. I was standing in the open with no intervening cover. He stood and looked at me for over a minute without showing any concern. Then, I blinked my eyes and he bolted like a cat with tail afire!