N4521U
Plastic Pirate
Charles, you could be right. In my sign painting days, to make brown one can mix red and green, but in the sun the red fades out and the sign turns a muddy green. However mixing Purple instead of red, the brown will last for a much longer time. So if red and yellow make orange, there could have been purple mixed into the primary colors to make the orange, and if the other faded out, walah, purple. After all, it was just Box Art on a model kit. I don't think the most permanent pigments would have been used for the box printing.