My hospital has assigned colors for staff (nurses, techs, respiratory, nutrition, secretary, transport, etc). OR, L&D get hospital supplied scrubs. Peds nurses get to wear designs and prints to appeal to the kids.
Custom unit/hospital shirts and jackets are also allowed but they are also generally in the designated colors as well. Personally I prefer my scrub top with my pockets to the shirts. I’ll wear the shirts in day to day life or when I come in for a class/training day.