

I’m not quite sure what you mean. If you took a picture of an orange and sampled a pixel from it, it wouldn’t look like an orange (fruit) any more, but it would look orange (color). Likewise sampling a pixel from a picture of a piece of gold wouldn’t look like gold (metal), but it would still be gold (color).
The article is paywalled, but from the part I could read, it sounds like they’re just making hyperbolic colors, which is a pretty well known phenomenon which you can experience at home: https://en.wikipedia.org/wiki/Impossible_color#Chimerical_colors
They’ve done it using a new technique which is cool, but seeing super saturated hyperbolic colors is not a new thing.