why do people who work in hospitals...?

Question

...only wear clothes in green, blue and white?

Answer 1

White: To spot stain (which might lead to infections depending on type)

Green & Blue, colors that have the following effects when viewed regulary: Calming, Trusting, Prolongs Memory and reverting back to nature, sets our primal instincts to a sense of "Im at home"

Answer 2

I work in a hospital and wear whatever colour I want. But many of our other staff wear specific colours. Housekeeping, porters, OR techs, Lab....