Как будет на английском "У моей школе нет школьной формы, но нельзя надевать яркие цвета"

Pupils in my school don\'t have to wear school uniform, but bright colours are not allowed.School uniform is optional in my school, but pupils mustn\'t wear bright colours.Pupils in my school obliged to wear school uniform, but they can\'t wear bright colours as well.