The term 'It's Blue' can be broken down into four crossword solutions: SKY (3 letters), SMUT (4 letters), Erotica (7 letters), and NAVY (4 letters). SKY is a common term used to describe the atmosphere surrounding the Earth, which is typically blue in color. SMUT is a slang term for obscene or pornographic material. Erotica is a genre of literature or art that deals with sexual themes in a more subtle and tasteful manner than SMUT. Finally, NAVY is a dark shade of blue that is often associated with the military.