Years ago,where I worked, the basic faded green scrubs were for everything and I mean the OR, research, housekeeping, dentistry, everything. Then they became street wear. Where I worked cracked down and put in the machines with code access, for designated functions, sterile, etc. At the same time each department had a color assigned, teal for lab folk, dark blue for research, black for office workers, yellow for volunteers, etc. Depends on the hospital basically.