With help from Ed Reitan's spectacular color television site you can see the early start at the Palace;
ABC Color Studios
Hollywood Palace (1965)
Hollywood, Vine St. North of Hollywood Blvd.
TK-41C (4), initially, no film or slide capability.
ABC's first Live Color Studio was in the Hollywood Palace Theater, starting in 1965. Remote Trucks were situated in the parking lot North of the studio. Cables were run into the theater to four TK-41C cameras for the production of the "Hollywood Palace", "Lawrence Welk", and later "King Sisters" shows. The mobile color trucks were leased from MGM, New York. There were no facilities for slide or motion picture film. After the first year using controls in the truck, a control room was constructed inside the theater. [6]
Initial ABC colorcasts had started three years earlier from film, starting with a cartoon show, "The Jetsons", on September 23, 1962. Only a single RCA TK-26 Film Chain at Prospect, Hollywood was used to transmit these shows to network for 2 years . ABC Engineering, New York , did not believe in vectorscopes, so none were provided by ABC to Hollywood.
You can see a complete network studio history here at Ed's website;
http://www.novia.net/~ereitan/studios.html