The planet known for having a blue color due to its methane atmosphere is Uranus. Uranus appears blue because of the absorption of red light by methane gas in its atmosphere. This unique characteristic differentiates it from other planets in our solar system. Uranus is an ice giant with a composition mainly of hydrogen, helium, and water, ammonia, and methane ices. Its distinctive tilt of about 98 degrees also contributes to its unusual seasonal changes and weather patterns. Discovered in 1781 by William Herschel, Uranus is the seventh planet from the sun.