Prompt -- Everyone has a soul mate and when your soulmate dies, everything turns black and white. You however were born into a world that's black and white and have resigned yourself to it, until one day you wake up and the would is in color.
Oh John Green <-- XD This is a really interesting idea though. Then again, doesn't the voice in your head sound like yourself? That is, if the voice you're referring to is that that you hear when reading to yourself.