For Christmas I received the NX-01 refit model from Polar Lights. I've been trying to find out the base color of the hull. The original version had a darker gray/pewter look (to me at least. For the refit I've seen both that and a lighter version. The kit comes a light greenish/gray. I've read that it was because it was supposed to be a step towards the TOS Enterprise. Is there anything official anywhere? I like the darker color but I do want to be as close to what it was supposed to be.
Since there is no screen canon for this design, I think the closest you're going to get to "official" is this image used in the Ships of the Line 2011 Calendar.
That is a good image. Better that I could find. I'm only a simple basic modeler so I'm going to have to decide which Testor's color will be closest.