The Arathaean Desert is large, and the sand-colour is primarily beige. There is very little life in the desert, save for the nomadic bands that are occasionally sighted and the heavily camoflagued wildlife. There is almost no plant life, meaning that everything that wanders the Arathaen Desert is carniverous. There are rumours of an underground colony of enormous, sentient trapdoor spiders, but they are likely just that-- rumours.
Arathaea lies within the Arathaean Desert, obviously enough.