Thank you.For the past couple years I was told by another Master Breeder this was a "Lavender Roux" - Then I was asked by geneticist if it was from the Scholfield Silver import or the German Pastel import - I told him the German / he said looking at the plumage he feels it's a " Roux Diluted Lavender" but testing was needed to confirm his opinion. He does currently have that cross being compiled in his lab. He is also working with the fee gene and Roux to see the results. BUT - he feels strongly it's a " ROUX DILUTED LAVENDER" so until he proves otherwise I'm going with his opinion.
He sent me this also - this may help you understand the Roux gene.
https://pdfs.semanticscholar.org/91bb/728f5c090cf60454b6ff9d5a026ec5695f93.pdf