It's a big green book....

Sometimes the best way to narrow the search for a book is by the color of its cover. Now a librarian has created a search page that allows you to enter a color (by hex number) and find all the books that have covers in that color. I entered the hex color for Pitt blue, #000066, and pulled up a whole pageful of covers. You can also just search for a random color.
Dave Pattern, the librarian who created the search page, is a librarian at the University of Huddersfield in England, so he spells "color" with a u.