The Stovebolt Site Forums The Parking Lot '60-'66 Trucks '61 paint code

I tried this in the paint and body forum, but it was suggested moving it here. I don't know how to move the topic, so I'll start over.

The tag on my '61 c20 says:

Paint: STD
Trim: SPEC

There's no numbers or anything else. ??
It looks to be Neptune Green. But what does the tag mean?

thanks!