The amount of fat is totally normal. Before they even start to lay hens or pullets build up a lot of excess fat, mostly in a fat pad in the pelvic area but they can put some fat layers throughout their body cavity and on different organs. I've butchered enough pullets, hens, cockerels, and roosters so that difference in amount of fat between boys and girls is obvious.
I don't have an explanation for that color though, don't remember ever seeing anything like it. Pretty sure that is not from the gall bladder or bile duct. It looks like it was on the outside of the fat pad, like a powder had been dusted in there.
If you are in the USA I'd be tempted to put it in the fridge and contact your county extension office Monday to chat about it. To me it is strange that both girls would have it.