Carl DuBois Coleman, 68, former chairman of the D.C. Board of Parole and of the D.C. Unemployment Compensation Board, died yesterday at his home in Silver Spring. He suffered from high blood pressure.

A former special assistant to Mayor Walter E. Washington and before that to D.C. Commissioner John B. Duncan, Mr. Coleman was appointed head of the parole unit in 1968 and shortly after that head of the unemployment compensation unit. He retired from both positions in 1976.

From 1950 until 1962, he was an assistant D.C. corporation counsel, becoming assistant chief of the law enforcement division of the corporation counsel's office.

In February, 1962, Mr. Coleman was named special assistant to Duncan, who was one of three members of the D.C. Board of Commissioners. When that form of city government was abolished and Washington was appointed mayor of the city in November 1967, Mr. Coleman was named Washington's special assistant.

Mr. Coleman was born in Danville, Va. He came here as a youth and graduated from Dunbar High School. He earned a degree in mathematics and education from Howard University and graduated from Howard's School of Law in 1935, when he entered the general practice of law here.

During World War II, Mr. Coleman served with the U.S. Army, seeing 21 months of duty as an enlisted man in Europe. He resumed his law practice in Washington after the war.

He had served on the Mayor's Criminal Justice Coordinating Board, the city's Public Safety Committee and the Adult Rehabilitation Committee. He was a former chairman of the NonDiscrimination Committee of the Health and Welfare Council.

Mr. Coleman was a former member of the Human Relations Commission of Montgomery County.He belonged to the Washington, National, D.C. and Federal bar associations. He had been a member of the American Paroling Authorities and the American Correctional Association.

He was a former president of the Pigskin Club and belonged to Peoples Congregational Church of the United Church of Christ.

He is survived by his wife, Pearl E., of the home; a brother, C. Kenneth, of New York City; a stepdaughter, Carol Schwartz, of New York City, and three grandchildren.

The family suggests that expressions of sympathy may be in the form of contributions to Peoples Congregational Church.