1945 Paint Color
Chris,
The easiest way to get a short list of which military paint colors are correct for which time period would be to Google up RAPCO Parts ad and click on the paint tab on the web site.
They list everything from early WWII thru Korea, Vietnam and Desert Storm. And they can supply it as well. I've used them for years and been very happy with the products and the service.
I think you will find the color 319 is the late WWII color. It will look GREAT on my err, I mean your Engineer Scraper.
Cheers
Cat Man