TBH I believe concentration on minutia to such a degree is a sign of a failing school.
My DS went to a school that changed it's uniform radically. Everything had a logo. The blazers had piping, the ties were changed, pe kits, the lot. By far the most ridiculous was the shoes. Black, fine, leather, fine however, there wasn't even a list of suppliers or styles that were suitable, because, in their infinite wisdom they had actually managed to rule all shoes as against regulation. What they were asking simply could not be found, anywhere. They requested black leather shoes with no logo anywhere on the shoe, no little tag, no writing on the holes for the laces,nothing on the tongue, nothing on the soles or inner soles. After sending raft after raft of children home for this infraction, they eventually conceded, once the impossibility of the task had been pointed out to them. That school has now changed hands twice and is back being run by the LEA.
Uniforms should be simple, easy to afford, hard wearing and flexible enough to adequately cover the often oddly shaped teenage body with comfort. Practicality should be the byword. Blazers should have a logo, jumpers should not. PE tops should have a logo the rest should not. Skirts should be all one colour. Shoes should be black leather and that should be as far as it goes. Suppliers should be anyone willing to stock said items, not one supplier who visits the school every 6 months on a Wednesday between 2pm and 2:05pm, then doesn't have said items in stock until 3 weeks after term starts, leaving children panicking they are going to be sent home for not having the correct uniform.
No ridiculous colour chart roulette tartan monstrosities that are a bitch to wash and iron and cost the earth. No changes of uniform for different year groups. No logos on bags, no regulation coats, hats or anything else.
Rules on hair should also be sensible. One lad in aforementioned school was suspended a couple of times over his hair. His crime, he was hairless. Bald, no eyebrows and no hair anywhere else. It was suspected he was undergoing some kind of treatment which rendered him thus, but he stated he wasn't. So first, he was sent home for having an inappropriate hairstyle, once his parents had convinced the school baldness was not a choice, they then decided he could not wear a hat, at all, ever, even if it was winter.