Paint code and where to get it

[69SCSS]

I'm painting my truck in a little bit here, and I want to paint the truck the same color as the interior is, dark olive green. I think this cab was a '68 GMC before from the color, but I have an '02 Silverado the same color and I loved it. Anyone know the exact color code, and if there's a place in the Portland / Salem area I can grab a pint to do some test sprays? Thanks in advance.

Here's a sample pic of the color.