My school uniform was pretty dashing
the sixth formers had maroon blazers, white shirt, black trousers and tie (the colour and look depended on whether you were a prefect, rugby team, had been awarded 'colours' for excelling in a particular subject, or hadn't). The lower school have black blazers and a striped maroon/navy tie. It's an all boys school too and a proper old grammar so it seems quite posh, and I always felt proud to wear it because it looked good and it marked me out as (reasonably) intelligent
It was kind of annoying that we had uniform at sixth form, but having said that, I'm quite glad because I feel like it was easier to have that then what the local academy sixth form has (you have to dress like business people, so office wear essentially) which seemed like there was pressure to dress appropriately from the teachers, but also to do it with style from the students.
And I think high school kids are quick to judge and be cliquey, and I felt like our uniform reduced that (probably also the fact that it was all boys as well). The only distinctions were jumpers (sleeveless/not, black/grey/maroon, sometimes people wore cardigans instead) and ties, which just denoted your achievements (or lack of them). We even had a 'haircut' policy that declared you weren't allowed patterns shaved in, and you weren't supposed to have your hair longer than your collar. Also, a really old rule stated that the Head Boy was the only student allowed to grow a beard.