more pleasing color that blends nicely with the dark background

And taking a screenshot while being able to see how the planets/moons orbit their host would be cool.

Another thing which would be useful: It is to have an option that makes the orbits automatically faint away when you're close to the surface of a planet, so you don't have to make multiple visits to the settings when descending down to take a picture and ascending up to view the orbits again.

we don't want it to blend iNTO the background

But alright, since you said it like "we don't want", I'll take your word for it and stop suggesting then.