I actually do have synesthesia, and I do hear colors in sounds. Like when I'm listening to The City, I think of pink and green. If I'm listening to Uptown Funk I hear yellow, red, and green. I also associate numbers, months, times, lengths, words, and names with colors.
But I also see strange things, like I'll see things in the corner of my eyes that look like they're there but are actually not. Like if I worry about cats or think about cats I'll see cats in the corners of my eyes looking into my eyes. (Cats do not make eye contact with humans) I also see ghosts, mystical creatures, humans, and objects. The second I move my head though it disappears into thin air, it's really weird. And sometimes in my bed, I feel like I'm rotating in a zero gravity area where nothing is touching me at all. And sometimes, even though my body isn't moving a way I am moving it. If I imagine a movement my body will feel like it's doing it, also a very strange thing.