ORIGINAL: MinnFlyer
Exact colors are totally up to you, but make sure they are contrasting - Good definition between light and dark
For example, Light Blue, Yellow and White are a poor choice
So are Red and Dark Blue
Mix a light color like white, yellow or light blue or green with a dark color like Red, Blue, Purple, etc
I'll second not using red and dark blue! My King Kobra is covered with these colors on the wing and part of the fuselage. During rolling maneuvers and some vertical maneuvers the plane can disappear when flying with a dark overcast. A plane doing 90+ mph in level flight only compounds this.
Hogflyer