As far as I am aware, a Java is a Java. However not all Javas will meet the Standard of Perfection description set forth by the APA. Blacks and Mottleds are the only ones recognized by the APA. So I would say that whatever is the dominant feather color is what you'd call them, knowing that they may not meet the SOP for their feather color with those Auburn genes and that Whites and Auburns aren't officially recognized anyway. I'd like to see what the Blue Javas look like that were hatched recently.
As far as most are concerned, there is only 1 color of Java, and that is black. They breed true for ever & ever and have been tested for genetic purity in an effort to bring back the pure breed.
Mottled is a lurking gene, and 2 birds having this lurking gene can produce offspring of mottled coloration.
I have yet to meet or speak to any Java breeder that recognizes the "Auburn" as anything other than impure genetics....an 'EE' if you get my drift.
If the bird's genes were pure, there would be no coloration on it except black, and in the mottled, white.
Don't even talk to Monte about the so called "Auburn".
he has been breeding Javas & supplied Urch with his line and for decades has hatched thousands of thousands of chicks and NEVER has he had so much as 1 "Auburn" sport pop out.
He insists someone inbred another breed into the black java to get an "Auburn" and so it is genetically impure, and should never be called a Java.
It CAN be a new breed and so should have a new name.
Side by side, you would never know they were the same breed, and technically, they are not.
Just sayin.
Keep track of the SOP & breed for SOP, and your flocks will improve, but you must cull all imperfect out of your flocks.
It takes time, and starting with the best you can find is a big help !