This color photo shows the black tail markings darker than the star and bar insignia, which look somewhat more faded than mine.
Looks like I also need to take the paint off the tail gunner hatch under the stabilizer, and add a touch of green overspray. This B-17G does not have staggered waist gun positions, so my right waist gun window and the right insignia's position are swapped, an unfortunate but necessary concession.
In this B&W photo, the black tail triangle marking doesn't appear as dark as the dark blue of the insignia, though the serial numbers appear to be darker.