Face it: you're a Muggle. You've fought this horrible truth your whole life, and even managed to maintain hope when age 11 passed you by with no Hogwarts letter to be found. We're adults now, and while we're (almost) one hundred percent sure that we will
If Hogwarts' dress code was a little more lenient...requiring the gray skirt, white shirt, House robes & tie, but allowing you to do anything else with it. I'm a griffindor but my fashion choices for each House.