Many song lyrics are poetic, but don't have a literal meaning. If this line means anything, it is unclear. Sometimes songwriters have secret meanings to their lyrics that are not intended to be interpreted. But sometimes the lyrics are included because they just "sound good" in the context of the song.

Thank you for your comments encontre esta traduccion que me gusto pero nose si se podra usar o si sera correcta "Besé el cielo para enviar su tristeza bien lejos"

Le doy un beso al cielo para mandar una carta a su color azul.