Gunmetal is taupe brown with silvery micro-shimmer strewn through the creamier base color. I used two coats for opaque color. I have no idea why this is described as a dark gray, because it’s barely gray on me at all. It does not resemble the Gunmetal eyeshadow shade at all (which is a dark gray with silver shimmer). I couldn’t think of a good dupe, though – I thought maybe China Glaze Ingrid, but it’s lighter and browner.