See, now I think the gray Executor looks better because, being a model builder (by hobby, not by trade), my logic is that all the other SDs are grey, why shouldn't the SSD be grey also? They're made from the same materials, and I don't think fashion is the Empire's top priority. The SSD is meant to stand out just based on its size...I don't think anyone can mistake it for a regular SD, so why should it be a different color?

That being said, the only reason I ever accepted it as a darker color in any sense was that because it was both bigger and that most of the shots we see it in are from below, I just figured the bottom was logically in shadow because of the size. In ROTJ, most of the shots you see it in from the top, it's grey like all the other SDs.