Awesome! Thanks - is that true also for “lavender” in other breeds?
Lavender has different genetics than blue. No, that chart will not be correct for lavender.
Lavender is a simple recessive: a chicken with two copies of the gene will show the effects (black diluted to light gray, red/gold diluted to pale yellow/cream). A chicken with one copy of the gene will not show any visible effects, but can pass the gene to their own chicks. Any chick that inherits two copies of the gene (one from each parent) will show it.
Final question just for helping rehome Atlas - does this fella look like a pure Ameraucana? (I know there’s no such thing as absolute but as best as we can tell)… might just help to know if people ask…
Since Atlas has a crest of feathers on his head, he is absolutely not an Ameraucana that meets the USA standards.
But what country do you live in? Different countries have different standards for some breeds. For example, Araucanas have a crest on their head in Australia but not in the USA.