Singing you the blues, you crayon up the music
When someone is feeling “blue”, they are feeling unwell or upset. Instead of letting someone keep your mood a single color, bring out the whole crayon is what Lupe is trying to say.
Also depending on a persons dialect from their given region the term “crayon” may also be pronounced as crying which ties into the “singing the blues” line
To help improve the meaning of these lyrics, visit "Heart Donor" by Lupe Fiasco (Ft. Pooh Bear) Lyrics and leave a comment on the lyrics box