Someone dressing well to impress others may refer to their behaviour as "flashing their greens". And they may describe their wallet or bank account as being "fresh out of greens" after purchasing the impressive clothing.
By Amil
Greens
Basic clothes worn by all medical staff in the operating room - unisex string-tie cotton of a distinctive green color designed to show blood spatters. More shapeless and characterless even than scrubs.
I almost didn't recognizeDr. Blank - I've never seen him out of greens before.