There're a couple of threads on INTPc with this in greater detail. I'm not able to find the link to a "noisy" picture right now, maybe Anon can link it?.
I don't see colours per se when I see people, it is more the perception of colour, even from online posts from strangers I've never met. Some people shimmer too.
It is linked to a feel/intuition of a person as well. I can be physically repulsed (e.g. nausea) by someone even if I do not know them at all.
It creates a dissonance sometimes, when a person looks "ok" to the logical mind, but the colours/feel is just weird. Not sure how to describe it.
Edit: Question: Do different coloured M&Ms taste different to you, if you do not look at them before eating? I get confused sometimes when I'm not certain if the colours exist for real or only in my mind, especially when they are things with real colour.
Right. Like, for example, I told Aimahn he's maroon to me.. It's not like when I read his text I see maroon in my eyes. It's my third eye that sees the colors. Shimmering is often with me, I see it in children a lot, and I shimmer to myself.
Also, that aura of instinct seems common as well. I am a bit naive when it comes to people, but every so often something strikes me as "this person's definitely.. off. or wrong somehow." and I never quite put my finger on it until their actions speak for me. Telling people that usually gets me crazy looks, since it's something difficult to explain.
And unfortunately, the only M&Ms that taste different are the peanut butter ones in the reese's pieces. Seeing the color itself would put a different taste in my mouth, but the M&M's flavor does not change.
Possibly related to Ni?
Anyway... I don't have any kind of synesthesia. I'd like to, though. Must be cool.
Lol. I don't think it's so much cool as unusually pointless. I can't think of any good/useful things coming from being able to smell nutmeg from seeing sheer curtains.. or tasting something when I smell it or see it. Colors for people are rarely useful aside idle conversation. If I didn't have it, I don't think I'd mind one bit. It'd allieviate a lot of "corrections" in my speech. I would never have to hear "..Something cant be LOUD, it's not making noise." or my eyes hurting from neon colors (I literally can't stand to see highlighter yellow because it's too loud for me.) or even worse "It's blue.. flavored?

"

the whole thing can get quite annoying/embarrassing. At least now I know it's a condition, and not me just being crazy. There's some comfort in that.