There's a 4" wide black stripe running front to back near each wing tip on the bottom. I will do the same on the top but it will have florescent red 3" wide with 1/2" black borders for a total width of 4". I did the bottom just before the test, glad I did because that yellow turns into a blur in the fading light. I will need to have the top like that so it's easier to see it going around the pylons and the callers can distinguish it from another yellow plane as I intend to race it in bronze class..... Or silver?