My secondary school has a different uniform for girls and boys, and I do mean different, not just blouses/shirts or skirts/trousers. They wear entirely different colours. It goes back to when they were two separate schools and then merged, but that was before I was born. Long before I was born. Possibly before my parents were born.
Not long after I left the principal apparently decided the uniform was going to change - for everyone. New colours so both genders wore the same, but wildly different colours from what they currently use. I remember my mum and my sister getting up in arms about it, not because of the price of a new uniform, oh no. Because the colours would be changed. Can't be changing those colours, that's like, the recognisable school brand!
I wish they'd done it. The girls have an awful uniform. Bottle green, apple green, red, and fawn. It's horrific.