While working at a tv distribution company about 8 years ago, I used to design these promotional one-pagers for various shows. After a while I noticed all of my designs were mostly blue and orange (or at least the main components of the design were). Then I started consciously trying to use other colour arrangements but orange-blue just always sort of looked best. I celebrated any time i managed to get a good looking poster/one-pager without relying on the orange-blue complementary contrast.

I wonder if women might have an advantage here due to many men being red-green colour blind to some extent.