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In both grade school and currently uni (even for long-distance students), it's the same thing. A short sleeve white dress shirt, a sunset-colored tie, a grey pleaded skirt that goes to the knees, sunset-colored socks, and shoes in the color of the skirt. There is an optional sunset-colored sleeveless sweater that goes with it. Anything can be worn over all this as long as you leave it elsewhere during class, but the only thing the school provides for that is an optional varsity jacket that comes in either lime green or reddish purple. The only two exceptions are during picture day and during the graduation ceremony when people can wear dresses, which I did during one of my graduations (uni graduation being escalative and out of order; I'm not "done" with uni).

In situations like I've been in, where being a student also doubles as a job sometimes (in human services class, a part of the education is diving into taking care of other people, and for the whole school year, I landed myself a teachers' role to the kids that come in which is a part of being taught), even for long-distance students, the sweater changes to a cooler color to help the people I'm presiding over distinguish me.