http://upload.wikimedia.org/wikipedia/commons/2/24/Janus-moon.jpg
It is a potato-tan-ish color.
Assuming you are asking about the moon Janus which orbits Saturn, then no it has no atmosphere.
Janus
the sun and the moon combined i believe
Janus is one of the moons for the planet Saturn
The roman name for janus is also janus
Saturn has many moons including Janus and Jarnsaxa. Juliet is one of Uranus' moons.
Janus has written: 'Miscellaneous essays in verse. By Janus, Junior'
Janus. The month of January is named for this god.
Janus IS roman.
Tim Janus's birth name is Timothy Peter Janus.
The color will then be in red.Therefore,the moon has a name called "Red Moon".
Artemis is associated with the moon and silver is the color of the moon.