In our solar system, Uranus is described as having a cyan or aquamarine color attributed to atmospheric methane; Neptune a deeper blue color at least in part due again to methane. During the day, Earth's sky has a blue appearance to a ground-based observer (due to Rayleigh scattering.)
Because its atmosphere has a blue colour.
Neptune's atmosphere is made up of hydrogen, helium and methane. The methane in Neptune's upper atmosphere absorbs the red light from the sun but reflects the blue light from the sun back into space. This is why Neptune appears blue.
Neptune
Venus is reddish brown on the inside of the planet, below the atmosphere. On the outside, it has a smooth blue color. So it is brown and blue.
Earth is called the Blue Planet, because it is about 71% water(the oceans).
Jupiter
Because its atmosphere has a blue colour.
Both Uranus and Neptune have methane in their atmosphere which absorbs red light, allowing the blue hues to be reflected. Neptune is a lot more of a blue colour than Uranus, but Uranus has more methane in its atmosphere. Its though that other constituents in Neptune enrich its blue colour.
Neptune's atmosphere is blue but it has some clouds. They are like white streaks and are scattered all over the planet Neptune.
Neptune's atmosphere is made up of hydrogen, helium and methane. The methane in Neptune's upper atmosphere absorbs the red light from the sun but reflects the blue light from the sun back into space. This is why Neptune appears blue.
Neptune
I would think Saturn.
Venus is reddish brown on the inside of the planet, below the atmosphere. On the outside, it has a smooth blue color. So it is brown and blue.
Earth is called the Blue Planet, because it is about 71% water(the oceans).
Neptune is the most blue planet, due to methane in it's atmosphere absorbing the red light. It's atmosphere is mainly hydrogen and helium though and the cold temperatures would be more of a concern than the actual atmospheric composition.
Uranus, the 7th planet from the sun, is bluish-green and gaseous. This is due to the methane gas in its atmosphere.
Your question describes the planet Neptune.