What is "old blue"

Old Blue may refer to:

• Old Blue, an alumnus of Christ's Hospital
• Old Blue, an alumnus of the University of California, Berkeley
• Old Blue (song), an old folk song, from which many variations have arisen
• Old Blue (rugby club), a Rugby Super League (US) team based in New York City
• The last remaining fertile female that saved the black robin from extinction
• A conservation award given by Forest and Bird named after the black robin
• A traditional name for Yale University

"Old Blue" (also known as "Old Dog Blue") is an old folk song, believed to have originated from the minstrel shows of the late 19th century. A 1928 version by Jim Jackson, entitled "Old Dog Blue", appears on the Anthology of American Folk Music album. Since this early recording, a number of covers and variations of this song have been recorded.