We saw our queen the other day and we decided to mark her. It makes it easy to find her when you are doing a hive inspection. It also helps during swarming season to know when a queen swarmed and you have a new one.
The markers we use are Posca by Uni. And if you are wondering why we used white, it is because there is an international color code you follow depending on when the queen was produced. This queen was born in 2011.
Years ending in 1 or 6 = White
Years ending in 2 or 7 = Yellow
Years ending in 3 or 8 = Red
Years ending in 4 or 9 = Green
Years ending in 5 or 0 = Blue