Well, according to the 505 diary, these Tigers of the 3rd company were delivered in "tropical camouflage". That's not very clear but there were only 2 "tropical" schemes authorised for the factories. The first scheme is medium dark. The second is grey over a light tan base (RAL 8020).
I'm assuming that the tanks arrived in a single light colour, like this new Tiger, and the writer called it "tropical". On that basis it could be Dunkelgelb or RAL 8020.
Comparing these Tigers to others of the time, the light base colour does seem unusually light. That would mean it's RAL 8020.
Then we have to ask, where did the company get 2 dark colours to paint the dark bands on these tanks? The grey that was issued in the second "tropical" scheme wasn't really dark enough. The simplest answer is that they got the standard red and green paints and spread them thickly. There are a few Tigers at training schools that have a similar appearance, although most tanks serving at the front didn't use the paint in this way.
We may never know.
David