I don't know if this is other people's experience, but here's my opinion. My SS has a red top and a white bottom. I often fly near dusk, and because of the light, both the top and bottom look dark. No light reflecting off a light bottom. Dark top hanging on to what light the sky is offering.

I've thought that a dark bottom and a light top would work better. The bottom is already dark and a lighter top (or detailing) would reflect the skys light.

Of course, it I can get the plane in a good bank, I can make out the color, but on shallow banks, it is often hard to tell.