When I visited UCI I wore black jeans, blazer, ballet flats and was by far the most dressed up. The guys wore just t-shirts and shorts (or jeans) w/ tennis shoes and there was a girl in short shorts and a normal t-shirt lol.
Some rabbits are black.
It is not the ... case that some rabbits are black. (if there aren't even ... rabbits that are black, then there are no black rabbits)
Yale is truly a black box when it comes to admissions. Usually one needs really high stats but their review process is so different from other schools you never really know what will happen.