I've taken some photos of my 3740, I bought it new sealed so it's never been built or exposed to strong sunlight . I would say that this is about the 4th time that I have lifted the lid on the box.
You can get a good idea of how grey it looks against the poly float in the hull of the boat, it doesn't look that grey when the top deck is in place but it does look grey in the box against the blue.