It doesnt matter if it fits the discription of a peacock on a certain website. If it came thru the importers as Aul.Royal blue (as they do 99.9% of the time) it can only be called a royal blue.
Ive had my strain for 10 odd years now and always breed true. I feed my blues a certain food but have given a mate of mine a batch of fry and 9months down the road i pop over to have a look at them and i get blown away. The blues i gave him are hugh and different colour then mine. Way i ask? because he feeds them nothing but trout pellets.
Best to call the Aul.Stuartgranti, Royal Blues, Red Shoulder or Hans.B