The queen marking system is as follows:
 
white or grey for years ending in 1 or 6
yellow for years ending in 2 or 7
red for years ending in 3 or 8
greeen for years ending in 4 or 9
blue for years ending in 5 or 0
 
If I can be of any futher assistance on queen rearing feel free to contact me
direct.
 
Dean M. Breaux
Executive Vice President
Hybri Bees Inc.
"Breeding Better Bees"