What is black and white but red all over?

The phrase "black and white but red all over" is a play on words for the traditional riddle "what's black and white and read all over?" The answer to the riddle is typically "a newspaper," as it is black and white in print, but read all over by people. However, the version with "red" instead of "read" is a pun, as "red" and "read" sound the same in English. Therefore, the answer to the phrase "black and white but red all over" is a newspaper that has been painted red.