>>6769164It looks like a washed out grey in the pic. If you want a really dark grey that is basically black vellajo makes a panzer grey primer you may like.
I don’t really know much about metal gear but a quick look through of pics of the red shows it in every thing from basically what color your painting to a much deeper grey to a almost flat white color. So I would say what ever looks good I to you guess. For my worthless opinion it’s just the contrast with the kahki making it looks lighter