New member, first posting. I am clueless about how to do this and will be surprised if it works.

Here gos. I want to paint my '41 pickup the original factory color of brewster green. I have no idea where to get a formula for this so that the paint people can mix it for me. And if I do, will it be only for enamel or will the formula work for today's paint. Sorry, I know allmost nothing about any of this.
Tom