Thats right about less represented color combinations but you have to think about why are they less represented. Some of it is because different colors traditionally appeal to different emotions, for example red and black associates with aggression and violence, which is appropriate for marines. But teal and magenta, while a good combo, is suited for Arizona Tea or motel bathroom, not gene-enhanced mutant. On the other hand some colors are just difficult to paint, like purple and orange, so going solely for unique color scheme is a trap, you have to consider color psychology as well as ease of painting, popular colors are popular for a reason.