Horror comics are comic books, graphic novels, black-and-white comics magazines, and manga focusing on horror fiction. In the US market, horror comic books reached a peak in the late 1940s through the mid-1950s, when concern over content and the imposition of the self-censorship Comics Code Authority contributed to the demise of many titles and the toning down of others. Black-and-white horror-comics magazines, which did not fall under the Code, flourished from the mid-1960s through the early 1980s from a variety of publishers. Mainstream American color comic books experienced a horror resurgence in the 1970s, following a loosening of the Code. While the genre has had greater and lesser periods of popularity, it occupies a firm niche in comics as of the 2010s.