What does 'black' often symbolise? It's not easy facing up when your whole world is black (Paint It, Black - The Rolling Stones)
depression, death, evil, etc.
What does 'white' often symbolise? Yeah, but did you do it? (Cell Block Tango - Chicago)
innocence, purity, goodness
What does 'red' often symbolise? But loving him was red (Red - Taylor Swift)
passion, violence, blood