Different professions and coloursI was thinking about colours which are related to different work or profession, like: an advocate wears black coat or gown with a white bow, railways T.T. also wears a black coat and black cap. Doctors are seen wearing a white coat but surgeons change their clothes, they wear green or blue ones. It is said that a senior doctor chose green clothes in operation theatre in 1914. I have read somewhere why green or blue are preferred for surgery is that green and blue are the opposite of red on the colour spectrum, and during an operation, a surgeon is nearly always focusing on red blood, so the blue and green help improve the surgeon's vision and makes them more sensitive to different shades of red.
I don't know if it is the right reason, however, these colours related to different professions distinguish themselves from one another. A person can recognise him if he is a doctor, advocate or engineer or policeman or pilot etc.