Nobody really knows exactly what animals can see but we obviously know K9s can see some color. Studies show that K9s see a smaller color spectrum than we humans do. While we see the world with a vast arrangement of colors, coyotes only see the yellow & blue color spectrum according to multiple studies.
Assumptions are made that K9s see every other color as shades of grey. This leads us to the conclusion that you should probably stay away from Blue or Yellow colors when you are going coyote calling. Red & Orange colors are typically ok & look like a shade of grey to coyotes. K9s are also considered near sighted when compared to a humans 20/20 vision. The majority of K9s have 20/75 vision & some even worse. So this means coyotes see at 20 feet what we humans can see at 75 feet. Cats are said to have even worse eyesight with around 20/100 vision. Coyotes have unreal peripheral vision which covers around 260 degrees, while cats are near 200 & humans are 180 degrees. This is why movement is critical when calling coyotes, they can pick up movement well before they can identify you sitting still in the wide open with no camouflage.
K9s & cats can both see excellent at night when compared to humans. According to many experts they can see up to x7 better than humans when it comes to low light scenarios. So the next time you think you are being sneaky by going into your first stand in the dark, you would probably be better served walking in when it’s light enough to see.
If you are planning a predator hunting trip keep in mind, these creatures see the world in a totally different perspective. Often humans tend to humanize animals & make hunting decisions based on our points of view & not based on science.