There is a lost Sheep in the Big City bumper that was aired on Cartoon Network from its "Cartoon Cartoon characters in the white background" series (since 2001). In this bumper, the color wools (blue, peach and light green) are falling around and it reveals to be Sheep, who is naked, then he takes the 1992 CN logo.

UPDATE: It has been found on YouTube on a video uploaded in 23th November of 2019. Link:

Community content is available under CC-BY-SA unless otherwise noted.