I want to go a couple shades darker on my new paint job??

Getting my camaro painted in a couple weeks. It is forest green and I want the color a few shades darker. Is this something the paint shop can do or do I need to get a completely new paint code?

You'd have to get another paint code. The painter should be able to help you with selecting that if they are professional. They should have paint chip books or something. You need to let them know you want to do that though before they order the other paint.