Will disclose some info. here I have four colors, white, BC, wheaten, and cuckoo and they all lay good dark color eggs. Just to get a little dialog going what makes the other three stay dark if the mossy and Loud colored BC make their egg darker. Now if we look at some of the darker eggs like BHB and Ruth have their female have plenty of color and there must be some kind of connection somewhere. I will say also that I only set the #6 or better colored eggs. Just looking for a common denominator or any info. that will speed up the process. Now I am not a genetic person with formulas and do not intend to be in the future. So does anyone have any info. Don