What the hell is the uniform code at Constance?

Is it just “wear anything vaguely preppy?” Because as a former private schooler we had the exact same uniform every day. I know some private schoolers have more leeway (more a uniform code than a solid standard uniform), but even then, there are still specific colours they have to wear (such as red, white, and black/navy blue), or general items (as in, wear a button blouse/shirt and a knee length skirt/ ankle length dress pants). Sometimes Blair and her minions wear different bright colours and skirts of varying lengths. Also the St Jude’s Uniform seems fairly solid/standard, which made it less believable for me. Like, if you’re not really having a proper uniform for Constance, do the same thing to St Jude’s for continuity’s sake!