Would you rather play a game on a build with high detail, lots of lag and horrible gameplay rather than a low detailed, minor lag and decent to good gameplay build?
Of course it's brown you idiot. Where the hell do you think this place is? Sitting on the rainbow? You're stranded in a desert-type area surrounded by mountains trying to get to safety. You don't need every color of the rainbow to make something look good, sure, it's nice to have a few other colors but dammit man, when you say something like "It's brown" and you know it's taking place in a setting like this then you're an idiot. I hate to say it but seriously dude, not everything can be perfect.
I'm not trying to snap at you or rage at you because at the time of posting I'm still waking up.