1959 saw several changes for the station. On February 1, WMBV swapped affiliations with WFRV-TV (channel 5), becoming an ABC affiliate. The station changed its city of license to Green Bay and on August 22, 1959 changed its call sign to the current WLUK-TV (in reference to its then on-air slogan "Lucky 11"), when it began broadcasting at full power from a new tower near Green Bay. WLUK first broadcast network programs in color in 1959 and local programs began to be broadcast in color starting in 1965. Morgan Murphy then sold WLUK to Post Corporation (a small media chain not affiliated with The Washington Post Company or its Post-Newsweek Stations division), whose properties included the "Post-Crescent" newspaper in nearby Appleton and a sister station in Marquette, Michigan, WLUC-TV. in 1965. In 1966, WLUK built a new studio and office building on Highland Avenue, which would eventually become Lombardi Avenue in 1968 after Vince Lombardi resigned his head coaching duties with the Green Bay Packers. It aired some local entertainment programs, including a Saturday night polka show and a daily children's cartoon show using the franchised Bozo the Clown character.