A great way to add an accent color or to add more
of an already existing accent color is to paint the back wall of a bookshelf.
This of course means the bookcase may become even more
of a focal point in which case some some extra styling may be needed!
(Images: 1 & 2 Steven Gambrel, 3 Domino via Undeniable Style, 4 Martha Stewart, 5 Living Etc)