cac_sabre:
Ref your post #3538, go to
FlightAware > Photo of VHBLM for an actual (faded) colour photo of the Norseman VH-BLM.
Also this site may be of interest to you: go to
Bobby Gibbes Sepik Airways (GSA) Noorduyn Norseman
All those checks look dark olive green to me. Also of interest in the second link, is the olive green painted wing struts on the Norseman.
Good luck!