PPG DPLF epoxy primer is available in 6 colors that can be mixed together (gray, gray-green, red, blue, white, black).
You could experiment with mixing black, blue, and the gray-green to get the shade you want. If you are happy with the color, you can spray a wet final coat to give the DP some extra gloss if you are planning to stop there.
If not happy with the color, you at least have a primer color that is close to a better color matched topcoat (which will make chips in a topcoat less noticeable). You can try again to get a better color match with the topcoat.
If you are happy with the color match of the primer, then you can bring a sample of that color to your local paint jobber and get it matched in a compatible topcoat. Pay attention to the recoat window so you don't have to sand/scuff the DPLF primer.
I topcoated my red-oxide DPLF primed undercarriage with a matching red-oxide color in PPG DCC product line. While this cost me more $$$ in product, I like the fact that the end result is easier to clean and can be "finessed" in comparison to a primer only finish.