You're gonna find that all colors on the bottom of the wings are either gray, or black, or shades of such, even white...looks gray..unless the sun hits it.....My 4 Star had a chrome fuse with orange wings and tail.....the contrast was blue and green...A stripe of blue on each wing bottom and the control surfaces were 2 toned......I think the orange vertical stab did more for me because of the sun than anything else...now when I was going vertical and rolling then the stripes on the bottom of the wings is what helped...at times the chrome fuse would reflect the clouds and sky and almost disappear...thanks for the orange