There've long been rumors that certain colors are more likely to be impostor than others. Some popular candidates for these conspiracy theories are red, purple, and cyan. However, none of this has been proven true, even by data miners, and the fact of the matter is that you can't increase your likelihood of getting impostor just by choosing one color over another. However, you are more likely to be impostor if you've just been impostor in the previous round. So if you enjoy being an impostor and you've just played as one, don't quit the game, and instead play another round, as chances are you could get to be impostor again! Bear in mind, though, that although the odds will increase, you're still pretty likely to be assigned as a crewmate.