Why do the camillion need to camourflage itself?

First of all camauflage is spelled camouflage and second of all animals camouflage by the color of their feathers, skin, hairs, etc. and or some animals have color blindness like for example the lion. The lion see everything red and brown is green to them so for a antelope, all it does is lay in the grass still a lion will look that way and leave because it thinks nothing is their.