Looney Tunes is a
Warner Brothers cartoon series that preceded the
Merrie Melodies series. The two series were given two separate names because originally,
Warner Bros. wanted them to be two separate cartoons series (in the same manner that
Walt Disney's
Silly Symphonies were separate from the
Mickey Mouse series). From
1934 to
1943 Merrie Melodies were produced in color and
Looney Toons in black and white; after that the only real difference between the two was in the variation between the opening theme music and titles.
http://www.toonzone.net