Hippodom was the FPHs' home continent in the classical mythology. In its center was the Pillar of Spirits, which was a whole lot of swirling water that connected the realm of the Great Powers to the rest of the world. The Purple Mists was the name of the inland sea, from which the Crystal River flowed. The city of Purpleopolis was located there. Classical myths seem to imply that everything was tinted purple.
Basically it looked like your mom's bedroom.