Let's say you have one homozygote and one heterozygote blue egg layer. No brown egg genes involved, one is, say, a pure Ameraucana and the other is a hybrid of Ameraucana and a white egg layer, let's say Leghorn since they lay such a chalk white egg. Would their egg shell colors be different? Would one be paler? If they are different, will it be noticeable or subtle? Another scenario. Brown egg genes are involved, let's say just a few of them so the color is a light green. Both have identical brown egg shell genes but one is a heterozygote and the other a homozygote for the blue egg gene. Is there a difference in color? Shade? Intensity.