Yellow journalism
Their Sunday entertainment features included the first color comic strip pages, and some think that the term yellow journalism originated there, while as noted above, the New York Press left the term it invented undefined. Hogan's Alley, a comic strip about a bald child in a yellow nightshirt (nicknamed The Yellow Kid), became very popular when cartoonist Richard F. Outcault began drawing it in the World in early 1896.  When Hearst hired Outcault away, Pulitzer asked artist George Luks to continue drawing the strip with his characters, giving the city two Yellow Kids. The use of "yellow journalism" as a term for over-the-top sensationalism in the U.S. apparently started with more serious newspapers commenting how far "the Yellow Kid papers" went.