Purple, because aliens don't wear hats.
If you go to the store and buy 20 watermelons, and your friend buys 50 cantaloupes, why does noone ask what in the world you're doing?
It fixes almost everything. If it moves and it's not supposed to, use duct tape. If it doesnt move and its supposed to, use w40.
Is there a tree in my front yard right now?