Well I attempted to add color to the white part of the covers on my books. Unfortunately, it didn't work the first time around so I will have to see if I can get the specs right so instead of the only color on the cover is the front.
It is all a learning process, trial and errors. I will get it figured out and it will not only benefit my books but any other covers I create for print.
As the saying goes, "If at first you don't succeed, try, try again." I will keep trying until I get it!