The real inventor of the color television was Guillermo Gonzalez Camarena (1917-1965), a Mexican national from Guadalajara Jalisco. His project was rejected by the Mexican authorities and had to go to the United States.
In 1934 he made his first TV when he was 17 years old, later he patented his color TV in Mexico and the US. From there the invention went to different parts of the world.
He invented the first color TX and first TV XEG. He holds the design and pattent to color television systems from 1940, 1942, 1960 and 1962.
In 1940 at the age of 22, Guillermo Gonzalez Camarena obtained US Patent #2,296,022 for his Trichromatic system used for color television transmissions.
In August 31, 1946 he sent his first color transmition from his lab in the offices of The Mexican League of Radio Experiments in Lucerna St. #1, in Mexico City. The video signal was transmited in 115 MHz. and the audio in a band of 40 meters.
RCA claims they did it in 1946 but Camarena's pattent has an earlier month. Also, there are previous attempts or designs but none worked properly. Camarena's was the first succesful one, therefore, the first.