It bears a striking similarity to the paint schemes of the YF-22 and X-35 prototypes, albeit a tad more contrasted. I don't think it's anything "final". Well, the F-22 is painted in a diffuse matte grey, that blends in fairly well with atmospheric haze at a distance. The same thing goes for other US air superiority fighters, like the F-15C and F-16C though they're not quite as high tech in terms of radar absorbent coatings and what not. Darker camouflages are seen in aircraft more focused on ground attack, such as the F-15E, the F-35 and the old stealth bombers F-117 and B-2.