MaeIstrom
Songster
The blue egg gene is dominant meaning it will always express in the first generation of crossing a blue-egg layer to a brown or white. If you then crossed 2 of these offspring together 25% will have two copies of the blue egg gene, 50% will have 1 copy and 25% 0 copies. It's from that last 25% you would get brown or pink eggs but from the look of your eggs you have 1st generation hens that should all lay roughly the same color.