Yeah, that paint example is going to be way too bright in game.
I still question where that turquoise blue originated from. I'm sure if you trace it back, it's probably an artist's representation in a book from the 1950's or 60's. Just like the red cowled 109F.
This plane was painted in the field, so what are the usual suspects for getting a light blue paint on an island near New Ginuea?
USAAC True Blue - most likely given that it's an Army Air Corps color.
RNZAF Roundel Blue - is plausible if units from New Zealand were based on the same island.
USN Intermediate Blue - is plausible if the Navy also had aircraft based on the same island. Least likely based on the time frame.