The world seen with human eyes is only a projection, enabling us to live on earth, not necessarily corresponding to how the world really looks (whatever "really" meant). The point is that we are created to live "in the middle", so we do not see distant stars, apart from our natural possibilities is also the detection of bacteria, omitting the issue of noticing the smallest components of matter. We can not see in ultraviolet and infrared. The red color is actually a bit more eye-catching than gray, but we have probably saved this information in DNA in the process of evolutionby the fact that red is associated with blood or fire, and therefore with danger, or with food (fruits on the background of leaves, meat). The world looks different for an orangutan, different for pine, different for a star, different fora computer, different for a human. I am convinced that there are still many things that we can not even dream about seeing.