Color(s)

>Real colors

The brain's responsible for translating the signals sent from the eye, but it needs to get the signals in the first place, and the signals determine what the brain has to translate.

Compare someone who's color blind to someone with the typical three types of cones in the retina, to people with four types of cones. Nothing different going on in the brain, it's all in the eye.

You're not the only one. See What I find strange is that some sounds have associated colors that even people without synesthesia would agree on, but there others that people with the same forms of synesthesia disagree on.

I only have auditory-visual. There's a few notes of the song "bleu" by worakls that have a really peculiar color, kind of a white-yellow-blue that is nothing like green. When I tried to explain this to my brother, who does not have synesthesia, he completely agreed that it made sense, but my sister, who does, disagreed even about the shape of those notes. Instead of a smooth elongated blue-white-yellow teardrop, they were a twisted ribbon of dull dark brown.

That's totally trippy dude.

On topic, I read that most languages name the color red first and blue last, and also that our eyes evolved to see blue last. The blue receptors are only around the outer rim of the retina, everything in the middle is red or green cones. I've noticed it's completely impossible for me to focus cleanly on a blue light source point when it's far away, but a red light near it I can focus on fine.

Colors are mental labels for different ranges of signal the eyes pick up.

If you could see a wider range of radiation, your brain would have evolved to invent more colors for itself anyway, or perhaps - if 6 hues is the limit, it might have evolved to stretch the color wheel out more so that ultraviolet becomes ultraviolet, infrared becomes red, and the colors we perceive in every day objects would be more subtly different from each other.

In order to know which of those scenarios would be possible, you'd need to be an evolutionary biologist specializing in the visual cortex.

I legitimately wish I had this condition. I feel it would enhance how I perceive and reflect on all kinds of stimuli.

It sounds somewhat like you're on a low dose of psilocybin at all times.

Here's how I would describe it.
Picture a circle that is a very pale yellow.
Put that circle on a blue background.
Now make the circle transparent, so you can see the blue leaking through.
It's not green. In real life it would be green, but can you conceptualize how it can be both yellowish and blueish without being green?

>white-yellow-blue

So the way the smell of a tropical swisher looks. I feel ya.