Irk

"We are now in Irk. It's a planet filled with purple and magenta buidlings, and those little green bastards, the Irkens. It seems they are now highly appreciated to the Coalition of the Red Star to enhance themselves a strong alliance for China, Russia, North Korea, and their allies, including the Irken Empire itself."

--Su Ji-Hoon, Irk

Irk is the homeworld of the Irken race, and capital planet of the Irken Empire. Irk's appearance from space is unknown to humans, but the capital city could be seen when Zim was rampaging through it in an Invader Zim episode, "The Nightmare Begins," having mistaken it for an enemy planet. A screen displaying a map of the Irken Empire in the same episode depicted a large, dark blue planet in the middle, identified as Irk. This coloring was likely meant to highlight Irk for easier identification by the Irken military audience. Irk is believed to be red, magenta or pink in color.