I cannot say for sure what the tank colour should actually be, but "Burnished Gold/Alaskan White" is listed in the 650 parts books for 1965, and also "Pacific Blue".
The tank badges I believe should be this style for 1965 (3 Gal shown):http://www.holdenmotorcycle.co.uk/productimages/096_768.jpg (image from the Holden catalogue):http://www.holdenmotorcycle.co.uk/viewProducts.asp?supergroup=&analysiscode=1805&groupname=Accessories&group=090
There were two different badge pairs, one set for the 3 (Imp.) gallon tanks and another set for the 4 (Imp) gallon tanks.