Looney Tunes/1942-1964

In 1942, the first full-color Looney Tunes short was released, The Hep Cat. The blurry dark rings using musical notes were replaced by bullseye rings, or concentric circles. This became the famous Looney Tunes logo. It is the longest used Looney Tunes logo, being used for 21 years.

1942 version
The logo begins with monochrome concentric circles, similar to a bullseye. A Warner Bros. shield comes out of the black circle in the center and "WARNER BROS." and "Present" appear above and below the shield respectively. The shield and text then fade to the Looney Tunes logo. "Produced by LEON SCHLESINGER" appears at the bottom of the logo. In many shorts, it faded to Porky and Daffy's heads, with the black circle omitted.

1943 version
This version is similar to the previous, except the rings are now in color. In 1944, a Bugs Bunny head was introduced for Bugs Bunny cartoons. This was replaced by Bugs Bunny sitting on the W-B shield from 1944 until 1948, when the Bugs Bunny head returned. The ring colors varied by season, starting with green and finally ending on reddish-pink. Also in 1944, after Schlesinger sold his studio, Leon Schlesinger Productions, to Warner Bros., all mentions of "Produced by Leon Schlesinger" were replaced by "Produced by Warner Bros. Cartoons INC. " or "A Warner Bros. Cartoon."

1953 version
The 1953 version made the center circle smaller and the rings denser. The Warner Bros. text no longer fades. In 1964, this logo was replaced by a more abstract one, making use of lines. Sometime in the 1950s, "REG. U.S. PAT. OFF" was replaced by a simple ® registered trademark symbol.

Music
The original theme was "The Merry-Go-Round Broke Down," the faster, brassier version introduced in 1941 by Carl W. Stalling. The theme was redone for a 1946 short. This version was only heard on one Bugs Bunny short. After that, it was redone again to sound "goofier." The version was used until 1955, when Milt Franklyn did his take on the theme, having more echo and sounding more orchestral.