At one time whites were in the APA Standard. They were removed because of their rarity and they lost popularity with new breeds that were being developed. I can't remember what year they were removed, but it has been a while.
My whites had slate shanks see:
These are their legs behind the BLRW.
My Blacks also had slate legs/shanks and the Mottleds had yellowish with greyish black shadows on the front.
On another note, I would love to get a hold of some of these:
Auburn Javas -...
Here are several links to threads I found on the subject of Javas. Some I have started myself.
Mottled:
https://www.backyardchickens.com/forum/viewtopic.php?id=268511
https://www.backyardchickens.com/forum/viewtopic.php?id=223204...