Sounds like you would like the light cream eggs that just came from my black crested beauties (Sex link Spitzhauben-Dominique crosses) chicken-math-genetics-experiments-in-southeast-missouri
I haven't found any research linking E (Extended black) with egg color, and the black pullets that just...
I struggled with Kippen initially, until I found a few other resources that helped me visualize the feather colors & patterns that related back to the genes in the calculator. The resource that helped me finally make the jump from letters in a chart to visualizing the impact of various genes was...
I'm also very interested in understanding shades of brown. Here's what I've been able to piece together, so far. Still very high level and I don't know how to figure out which chickens have which genes, or how these relate to O/O...
Eggshell genes
Protoporphyrin IX
CPOX - high expression =...