With your rooster coming from a breeder I would be fairly confident that he's homozygous (has two copies) of the blue egg gene. Which means that 100% of his offspring will inherit 1 blue egg gene from him. So all of his female offspring should lay some shade of blue or green.
@WingItRanch has already shared the most basic fact about egg colors. Egg shells are either blue or white. Every other egg color is layers of (brown) pigments over the blue or white base. White eggs with "brown" pigments become brown eggs. Blue eggs with "brown" pigments become green eggs. The shade of green depends on how many and what kind of brown pigments are present.
@WingItRanch has already shared the most basic fact about egg colors. Egg shells are either blue or white. Every other egg color is layers of (brown) pigments over the blue or white base. White eggs with "brown" pigments become brown eggs. Blue eggs with "brown" pigments become green eggs. The shade of green depends on how many and what kind of brown pigments are present.
