Norby is an American sitcom television series that aired from January 5 until April 6, 1955 on NBC in color. RCA's color system wasn't used until the fall of 1954. This is the first color show that I'm aware of.
1952
1964
1971
1988
1962
1974
1985
1975
1972
2003
1999
2005
2000
1983
1995
1989
2018
2001
2002