Whatever Heuhen meant, I mean this (actually not two, but as much as FOUR sets of colors):
Btw. now on the blank F.27 You have different colors of windows in the passenger cabin and different in the cockpit. Decide on one set of colors and use it consistently.
(If You would ask me, I'd adapt the one from IA.35 - frankly, the way how good it looks makes me think about adapting something similar
)