Neptune is a bright azure blue color. The predominant blue color of the planet is a result of the absorption of red and infrared light by Neptunes methane atmosphere. Methane absorbs light at 600 nm, which is the red end of the spectrum of visible light. These methane clouds absorb the red end of the spectrum, and allow the blue end of the spectrum to bounce back out. So when you see the color of Neptune, you’re seeing reflected sunlight with the red light stripped out. From a distance, Neptune looks just like a blue ball, but as you get closer, you can see variations in its clouds. Lighter clouds of methane hang above the lower cloud deck. Powerful storms whip across the surface of Neptune; the fastest storms in the Solar System are on Neptune, with winds exceeding 2,400 km/hour.