What we *can* see are the objects in orbit, like planets, moons, or satellites. Those objects have their own colors based on their composition and how they reflect light.
For example:
* Earth: Appears blue from space due to its oceans and atmosphere.
* Mars: Appears red due to its iron oxide-rich surface.
* The Moon: Appears gray due to its dusty, rocky surface.
So, when you see a diagram of an orbit, the lines or curves are just a visual representation of the path. They are usually drawn in a simple color like white or grey to make them easy to see against a black background.
