Alternates to what we see

Hey, what would another world line look like anyway. Perhaps we can consider an alternate traffic lamp and why the colors would not be the same. I mean the same as ours. For example, there are people who suffer from a genetic disease known as protanopia. Fact is, protan color blind are less sensitive to red light and so have difficulty seeing a traffic light that is red, but not orange. Changing the stop light color to amber honey would reduce accidents in cars.