About his daughter Blue Ivy Carter. This is not the first song he’s written about her.

Note also that “Jay-Z Blue” is indeed a real color that Hov tried to trademark back in 2002. True to form, it was flaked with platinum.

That’s in emulation of artist Yves Klein and his patented IKB (International Klein Blue), designed by the artist to illicit strong emotion, and notoriously difficult to reproduce on a computer monitor.

Jay has even mentioned in song his infatuation with the color, on Young Jeezy’s “Go Crazy (Remix)”:

Attract money, my worst color is light green
My favorite hue is Jay-Z Blue

The sample voice in the background comes from the movie Mommie Dearest. The “Don’t fuck with me fellas…” and the “I work and work..” both come from this movie.

http://www.youtube.com/watch?v=TFdFLdh8new

Samples Notorious B.I.G’s “My Downfall”