I sprayed a peice of vinyl off of the "B" pillar from a palomino interior and it is definitely lighter than what I have in my interior. However, I could probably use it for the seats and headrests as they are the lightest of all the different shades of palomino in my car. I don't know what has faded or aged darker, but I would imagine that when new the interior was a bunch of slightly different shades to start out with, simply because it is almost impossible to mold the same color into so many different materials. I may try to find a darker, orange-y brown SEM spray to use as a primer, as this stuff is not opaque. That may help. You can always take a hard peice of plastic (like the doorsill) to the paint shop and have them custom-mix the SEM for you. I have done this and it was exact.