At high altitudes, Neptune's atmosphere is 80% hydrogen and 19% helium. A trace amount of methane is also present. Prominent absorption bands of methane exist at wavelengths above 600 nm, in the red and infrared portion of the spectrum. As with <answer>Uranus</answer>, this absorption of red light by the atmospheric methane is part of what gives Neptune its blue hue, although Neptune's vivid azure differs from <answer>Uranus</answer>'s milder cyan. Because Neptune's atmospheric methane content is similar to that of <answer>Uranus</answer>, some unknown atmospheric constituent is thought to contribute to Neptune's colour.
What planet also gets it's color from atmospheric constituent? 
Uranus