In the UK hospital uniforms on the ward are generally a white tunic with navy blue piping around the collar and navy trousers. This tends to be across the board, OTs have green piping and Radiographers red theoretically to be more easily identifiable to the patients. However my experience is they will tend to call you nurse unitl you've established exactly what your profession is and how it fits into their care. In outpatients or paeds you sometimes get away with wearing a poloshirt and tracksuit bottoms which in my opinon is better especially for hands on practice.