Mars
Mars, because of the deep rich red colour of it's sandy desert surface.
they are called terrestrial planets. for example: Mars (The Red Giant)
Well there are many different ways to look at it. If you are just talking about in iur solar system there are only two planets. Mars and Jupiter. Mars is totally red, and Jupiter is yellow, red, brown and white.
The reddish brown is appearance is because of rusty dust on the planets surface.
The Jovian planets are gas giants and have no surface.
Jupiter has the famous "Great Red Spot", caused by storms on its surface. Uranus also has a spot, but it is dark blue in color, not red.
Jovian Planets do not have a solid surface to stand on.
Of all the planets the surface of Mars is closest to being like Earth.
It isn't Mars is called "The Red Planet" because it is visibly redder than the other planets (due to the iron oxide on the surface)
earth
Neptune has a surface more similar to the inner planets than to the other outer planets. It is primarily composed of rock and ice, similar to the composition of the inner planets, whereas the other outer planets are predominantly gas giants.
The surface temperature of Venus is higher than the surface temperatures of the other inner planets because of its thick atmosphere.
The inner planets, except earth, are made up of rocks. They have a hard surface. The earth would be one of these except we have water. The outer planets are gas giants and do not have a solid surface.