This one is pretty much a slam dunk...looks gray to me. Cool pic, thanks Jesse
BTW, which Insider was this from?
Looking at this image, I can say one thing definitively: this guy is just BATHED in light! There's an overhead light source behind him that's illuminating his shoulders and arms, and there's another light source in front of him with a red tint that's coloring his face.
All of this light will make any dark garment or fabric appear lighter. Is it possible that the uniform is darkl grey? Sure. But the way this shot is lit, it's hard to tell definitively what the true color is. The only way to be certain would be if there was an evenly lit photo of this guy from some sort of production archive.