his graphic is pretty small, but i do notice an anomaly that is very common to the Dorfan covers... the borders are never very crisp and often discolored.
a simple fix would be to crop the image down to exclude the orange border and then recreate the 2 color border using colors picked off the original. here is one of my originals...
and a fixed up version...
probably look a bit sharper on the T if it's not too late to fix.
cheers...gary