I feel the color brown is a great color to use a base. I have a brown couch that I have blue pillows on as my accent. I use brown a lot in my crafts as my jumping off point.
I ignore the rule "Don't judge a book by it's cover" I DO judge a book by it's color. I am drawn to books that have fun brightly colored covers. I don't tend to read boring plain covered books. Usually I enjoy my books, sometimes your grandma isn't right!