Hugh Morgan Hill (July 12, 1921 – November 3, 2009), also known as Brother Blue, was an American educator, storyteller, actor, musician, and street performer based principally in the Boston area. After serving as First Lieutenant from 1943 to 1946 in the segregated United States Army in World War II and being honorably discharged, he received a BA from Harvard College in 1948 (cum laude in Social Relations), was accepted into the Harvard Graduate School of Arts and Sciences (GSAS) before transferring to receive a MFA from the Yale School of Drama and a Ph.D. from the Union Institute. While performing frequently at U.S. National Storytelling Festivals and flown abroad by organizations and patrons from England to Russia and the Bahamas, Brother Blue regularly performed on the streets around Cambridge, most notably in Harvard Square. He was the Official Storyteller of Boston and of Cambridge by resolutions of both city councils.

Brother Blue was a 2009 recipient of the W. E. B. Du Bois Medal from the W. E. B. Du Bois Research Institute at Harvard University, named for W. E. B. Du Bois, the first African American to earn a Harvard PhD in 1895. Brother Blue's award was accepted posthumously on his behalf by his spouse, Ruth Edmonds Hill, oral historian at the Radcliffe Institute for Advanced Study at Harvard University, on December 4, 2009."

Hill was born in Cleveland, Ohio. Raised in the boisterous revivalist African Methodist Episcopal church of the 1920s and 1930s, he was the grandson of a slave who heard tales of his grandfather's slavery from his father, a devout Christian. The Hills lived in a poor area in Cleveland, Ohio where they were one of few black families. Brother Blue recalled his childhood as a rough time, saying "I'm like a flower who grew up in rocky soil." During Sunday church services, Blue found his voice telling stories, carrying this art forward into Sunday school sessions he taught after prayer.

Entering Harvard on scholarship, Brother Blue won the undergraduate Boylston Prize for his recital of a speech penned and originally orated by Haitian slave rebellion leader Toussaint L'Ouverture. He subsequently won the Walt Whitman International Media Competition for delivering selections from The Autobiography of Malcolm X. Inspired by American Civil Liberties attorney Clarence Darrow of Scopes Trial, son of an abolitionist family, Brother Blue initially intended to apply to law school in order to become "the black Clarence Darrow." However his storytelling calling brought him successfully to Yale School of Drama's graduate school instead before obtaining his doctorate in Divinity from the Union Institute.

Brother Blue and Ruth's ubiquitous symbol is the blue butterfly, inspired by the blue morpho native to South America. The story of a caterpillar's struggles, hopes and dreams and metamorphosis into a butterfly was one of Brother Blue's signature motifs. Brother Blue also acknowledged the butterfly's ancient Greek association with the psyche. Blue's clothing was often covered in butterfly medallions and blue butterflies were frequently painted on his cheeks and the palms of his hands, sometimes even drawn on with a ballpoint pen. In the later part of his career, Brother Blue constantly wore a broad, breast-plate-sized medallion around his neck which was one of many butterfly-themed gifts with which people expressed their appreciation and affection for the Hills. Brother Blue's publications, media jackets, festival banners, ornamental staff, and stages were also frequently decorated with butterflies. In his role as Merlin in the 1981 George A. Romero film Knightriders, blue butterflies can be seen as the camera zooms in on his hands as they wave goodbye during a funeral which he officiates in the film.

Brother Blue wore a predominantly blue ensemble, sporting blue turtlenecks or collared shirts and blue pants. He frequently wore a blue beret on which butterfly pins, some with rhinestones or sea opals, were affixed. He wore a sash emblazoned with "BROTHER BLUE STORYTELLER" in his capacity as Official Storyteller of Cambridge, Massachusetts. Ribbons laced his shoulders, arms, elbows, wrists, knees, and ankles and he was known to carry bright blue balloons. Inspired by Judaic, Vedic, African traditions, he often appeared barefoot or would take off his shoes in the early course of a performance to touch earth as sacred ground.

Brother Blue's 2002 business card read "Storyteller, Street Poet, Soul Theater".

"From the middle of the middle of me," Brother Blue would say, twirling his finger in the air and tapping it on a listener's heart, "to the middle of the middle of you ..." as part of his traditional opening. He would continue, "I am older than the oldest stories, I am the storyteller." A signature story which gave form to one face of this archetypal "storyteller" from Blue is his tale of Muddy Duddy, a fictional musician who could hear the sound of a harp coming out of the earth.