Colorization

Colorization is the process of adding multiple colors to a black-and-white or sepia-tone (or otherwise monochrome) film. It may be done as a special effect, to "modernize" black-and-white films, or to restore color films.

Looney Tunes
In 1967 and 1968, many Looney Tunes from 1935 to 1943 were redrawn and colorized. These releases contained limited animation and every other frame was redrawn. Another process began in 1973, when Looney Tunes from 1931 to 1933 were colorized, followed by the Turner colorizations in 1986.