"We want a color that's easy to camoflage, but we're moving the base around so much it's hard to find a general duty uniform that functions. We've had bases on forest planets, snow planets-"

"All planets have dirt."

"Actually, gas giants-"

"All planets with a survivable atmosphere for our troops have dirt."

"But Hoth-"

"All planets with a survivable atmosphere for our troops have dirt eventually."

"Okay, brown it is."