I see it but it doesn't really feel like a new color? It just looks like blue on top of black. Maybe a new intensity, if I was being super generous, but not a new color.
I think it qualifies as a new color. If we can't differentiate colors on saturation, hue or intensity then I don't know how there are supposed to be multiple colors at all. It seems like fair play by the scientists, if a bit shrewd in defining "new".
To me, Stygian blue doesn't look like blue on top of black. It looks like black that glows blue, which doesn't make sense in the real world. I think it is fairly described as a new color—I would be quite unsettled if I encountered it in real life.
Of course, colors are a hallucination our brain produces, so perhaps different brains deal differently with an unusual experience like Stygian blue.
> I think it is fairly described as a new color—I would be quite unsettled if I encountered it in real life.
I don't feel this follows. There are a lot of things that would unsettle me if I saw them, like if someone gave off a visible aura. Heck, I even found a "black flame" a bit unsettling, and I saw a literal video of it on YouTube (look it up if you don't know what I'm referring to). I'd feel similarly if I saw a transparent human too. The feeling you get - or the fact that you haven't seen something visually similar before - doesn't really imply it's a new color, I think!
I get more of a black in the middle and blue glow around the edges. Also not sure it qualifies as a new color. To me, it's more like an interesting illusion that combines black and blue.
