Пишут, что в Амазоне реализовали цветовую дифференциацию штанов:
blue = full-time/permanent employee
white = seasonal/temp employee
yellow = vendors (and DSP employees, if I remember right).
It's more or less their way of tagging you with a yellow star so they know who they can treat like shit. Hah, just kidding, they treat everyone like shit.