"Personification - Color (everyone has a specific color)"
I doubt that is related to synesthesia directly. I would look into aura reading as an explanation for that.
Just for fun I've been looking for aura's where I work. I simply imagine that there is a color surrounding a person, and then I imagine what color it is. It is fairly consistent from day to day, and there isn't a person I can't look at and not quickly pull out an aura.
I didn't bother spending a lot of time looking for a link, but here is an interesting one that defines what some of the colors of a person's aura mean: OMG I'M A LINK
Refining my aura reading is somewhere on my long list of "things to do".