If your queen is homozygous for the Cordovan trait (she is if she is Cordovan colored), which means she has both genes for the trait. So all her offspring will get a gene for the trait from her, all of her drones will be Cordovan, since they get all of their genes from her and she only has Cordovan genes, all of her female offspring (workers and queens) will be homozygous for the Cordovan trait, like their mother, if they also get the gene for Cordovan from their father, drone. So, if she has mated with any Cordovan drones, then all her female offspring which are fathered by Cordovan drones will be homozygous for Cordovan and they will exhibit the Cordovan color trait.