Red, which is why it's nicknamed red planet.
red
This is planet Mars.
Mars. The iron oxide (rust, basically) on its surface gives Mars a reddish appearance.
Mars is a terrestrial planet. It has a reddish appearance due to the presence of iron oxide on its surface.
The Romans named the planet Mars after their God of War, whose name is Mars. They named the planet Mars because its red appearance reminded them of the blood that people shed at war.
Mars (pronounced /ˈmɑrz/) is the fourth planet from the Sun in the Solar System. The planet is named after Mars, the Roman god of war. It is also referred to as the "Red Planet" because of its reddish appearance, due to iron oxide prevalent on its surface.
Mars was named after the Roman god of war. It is also referred to as the "Red Planet" because of its reddish appearance. The reddish appearance is due to the large deposits of iron oxide on its surface.
The red planet (or Mars) is a planet that contains both iron oxide and polar ice caps. Mars contains iron oxide in its soil, which gives the planet its red appearance.
Mars is sometimes called the "Red Planet" because of its reddish appearance, due to iron oxide prevalent on its surface.
The reddish brown is appearance is because of rusty dust on the planets surface.
The red planet is Mars, 4th planet from the sun and 7th largest. The name of the month of March derives from the name Mars
Photos from the surface show Mars to look a lot like an earth desert.