Originally Posted by Bombay
It helps with orientation. This is especially true if you are flying high and far away at night. Unless you have the entire plane lighted up (wings, rudder, canopy, fuselage, elevator, etc), you are soley relying on the lights for orientation.
When you only have the top and bottom differentiated by a different color, you will be able to tell top from bottom, but it is often very difficult to determine which way the plane is flying. Your mind plays tricks on you in the dark.
Yup, your mind plays tricks on you. Eventually this subject always comes up in airplane discussions, whether it's night coloring or day coloring, someone will come along and say they have a fool proof way to color things, but it's never true. You can do this and that and experiment, and everyone experiences color in different ways, so you just do what you do until you get it right and hope you don't destroy too much equipment in the process