The Black Book of Colors by Menena Cottin and Rosana Faria

As you can see in the picture, the book is almost completely black, except for the text. 

Text is simplistic, but its very simplicity is what makes this book enjoyable.  Each two page spread has one page with text on it, about 1-2 sentences.  Above this, there is the same text in braille. On the opposing page, there is a raised picture (in black on black pages, so you can't "see" anything unless you slant the book to catch the light at the right angle).  The book discusses a boy and how he, being blind, feels colors that he can't see.  For example, the first page says "Thomas says that yellow tastes like mustard, but is as soft as a baby chick's feathers." Raised pictures is of detailed feathers. 

This book is great for discussing not only the fact that some things are very different, but also a springboard for discussing how one could describe different things to a person who can't see them.  All of my children loved this book.