There are many colors, bright or dark. More important than it seems at first glance, the color is not only a matter of preference.
To be able to camp when camping in the shade is not possible either to the sea, on the beach, you should choose a bright model: sand color (light grey) or yellow (possibly olive). In a dark-skinned model air will heat faster, and throughout the day will be warmer than in one that has a lighter color. A sunny day in camping, in a spacious and breezy model, is a real pleasure.
There are many models of green or dark green. But often, manufacturers offers for the same model 2 alternatives of colors. Models for alpine expeditions are usually colored in red, orange, or a combination between this two. Bright colors, which contrasts with the white-dominated landscape around them.