Interesting about the egg color skipping a generation. All of my breeding hens came from the darkest eggs I had. Nice colors,at least 5 on the chart. All but 2 of my hens lay a 5-6 on the chart. Those 2 started with a 4,but I can see them gradually becoming a little darker.I have not included those eggs in any I've shipped(except as extra extras),but it's quite possible that chicks hatch from these eggs could lay darker eggs?