Overhear in the UK we have been wearing green uniforms for sometime now, the Ambulance services do have different styles but have found that with the Green & Yellow reflective safety jackets do remove them from looking like the Police & Fire services.
The type of uniform style that is used mostly here are dark or kelly coloured green combat trousers
short sleeved shirts with pockets for torches,Pens etc and epauletts with service name and grade in blue or green,some service also wear red,also a Blue or white T-shirt is worn under the shirt and top jackets in green or green & yellow with reflective words on the front & Back ie, Ambulance or Paramedic & Emergency Medical Technician.