Icon and font change (colour and feel) since iOS 17.5.1

All my apple icons have a completely different colour and feel. For example on the Airplane option in settings, it's now red not orange. And the blue for things like wifi and bluetooth is a bright blue. I can see it on other things as well but it's more noticeable on items in settings. Anyone else seen this? Have attached a screenshot from my phone and one from my friends who hasn't yet updated.