Wiz Khalifa came out with Black and Yellow was released at the end of March in 2011, during the football season. He wrote his song for his Pittsburgh teams: the Pittsburgh Penguins and the Pittsburgh Steelers. That year, the Steelers made it to the Superbowl and that song was played in their honor, like the theme song for the Steelers. They were playing the Green Bay Packers in the Superbowl, so in response, Lil' Wayne remade the song and titled it Green and Yellow in their honor.
This is a common theme in Hip-Hop: making a rebuttal song. What I find interesting between these two songs is that Black and Yellow alludes to the Pittsburgh teams, and doesn't mention what the song is ever about. Green and Yellow on the other hand is blatantly obvious as to its intentions and states the Packers' name as well as puts down the Steelers'.
