That yellow, where the pine is going dormant for "winter" (and I use the term lightly since this is GA and from what I hear winter is only winter at night most of the time, and even that doesn't last for long). I think it must be a blend of Yellow Oxide and Titanium White? Maybe with a smidge of burnt sienna mixed in where it darkens? IDK. I'll have to play with it tomorrow, but just wanted to throw down my estimate before I try! :)