Post by member Hugh Gibson:
Below I thought I might share a small technique I use to know what color marked queen is in a particular hive before opening it.
The last couple of years I started to make my own nucs and over wintering them allowing me to get away from buying package bees. It has worked fantastically. I only have 5 hives from various years and I was raising my own queens and painting the color code onto them. When I returned to the nucs and hives I could never remember what color I was looking for. Not that it was awfully necessary to know up front to find the queen.