Here are the Colours from the Old Canadian 1-GP-12c Colour Standards.
Olive Drab Semi Gloss 503-220
Olive Drab Flat 503-320
The Tri Colour Scheme consisted of the following colours.
Black 512-301
Olive Green 503-321
Green 503-322
Tempo Aerospace
http://tempo-aerospace.com/Tempo-Home.html
An orginal Supplier to the DND of 1-GP-12c colours still has the Colour chips on file and can match any of the old 1-GP-12c colours.
Matthew