Hmmm I'd say you'd have to keep it quite simple sadly, if there's a uniform that involves a navy skirt say, I don't think you'd be able to wear purple. I know when I worked as a receptionist I had to wear a black skirt and white shirt. But I wore cute shoes with a flower on then.I was only allowed minimal jewellery too, so just a simple bracelet, necklace and small hoop earrings. I think it mainly depends on how strict the place is. I always just used to wear purple eyeshadow, and a lipgloss to 'glam it up' a bit, but it didnt really work lol