The first license to broadcast in color was issued to CBS by the Federal Communications Commission on Oct. 11, 1950. The license was to go into effect on Nov. 3.
To stop CBS from using the license, RCA filed a lawsuit, claiming CBS color technology (Reference 1) was inadequate. On Nov. 15, 1950, the courts ruled in RCA's favor, and a restraining order was issued.
The restraining order did not stop CBS. The court upheld its right to broadcast its TV transmission in color. RCA appealed to the Supreme Court, but on May 28, 1951, the Supreme affirmed the lower court ruling. CBS became the first TV network to broadcast in color the "Arthur Godfrey Show' on June 26, 1951.
New York's WCBS became the first local station to broadcast in color--a baseball game between the Boston Braves and the Brooklyn Dodgers--on Aug. 11, 1951. The first color broadcast of the NFL was on the CBS affiliate in Philadelphia on Sept. 29, 1951.
In 1956, Chicago TV station WBNQ (NBC owned) became the first TV station to broadcast totally in color.