Is it possible to conceive of another primary colour?

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Discussion Overview

The discussion revolves around the concept of primary colors, particularly whether it is possible for the human mind to conceive of a new primary color that does not currently exist in our known spectrum. Participants explore the implications of such a color on perception and cognition, as well as the biological and evolutionary aspects of color vision.

Discussion Character

  • Exploratory
  • Conceptual clarification
  • Debate/contested

Main Points Raised

  • Some participants propose that the human mind's conception of color is limited to what has been visually experienced, questioning the ability to imagine a new primary color.
  • Others express a fascination with the idea but admit to struggling to conceive of a new color themselves.
  • One participant suggests that stimulating the brain's vision-processing areas might allow for the experience of a new color, although this remains speculative.
  • Another viewpoint discusses the experience of color in individuals born blind, raising questions about their perception of color and the potential impact of gaining sight.
  • Some argue that primary colors are arbitrary and can be defined by any three frequencies of electromagnetic radiation, not necessarily limited to visible light.
  • A participant notes the limitations of human color perception, emphasizing that even normally sighted individuals cannot perceive wavelengths beyond the visible spectrum.
  • Another contribution highlights that color is a construct of the brain, suggesting that it is conceivable, though unlikely, for a drug to induce the perception of a new color.
  • An extensive discussion on the evolutionary history of color vision in mammals is presented, indicating that many mammals have less complex color vision systems compared to other animals, which may relate to their ecological niches.

Areas of Agreement / Disagreement

Participants express a range of views on the nature of color perception and the possibility of new primary colors. There is no consensus on whether a new primary color can exist or how it would be perceived, indicating ongoing debate and exploration of the topic.

Contextual Notes

Limitations include the dependence on personal experience and biological factors influencing color perception, as well as the unresolved nature of how the brain processes different wavelengths into color experiences.

  • #31
BobG said:
They must spend more time looking at those little paint charts than I do. Like anything else, most people can improve their color perception through practice, or just by being more interested.
This is part of my point. If people can be trained to pay attention to, and name, and remember subtle differences in color, it strongly suggests that we all do see color pretty much the same. This kind of goes against your speculation that we might be experiencing greater differences in color perception than we realize (except in the case of undiagnosed partial color-blindness).

I think if I showed you something ecru and something tan side by side, you'd have no problem seeing the difference. Becoming conversant with all the terms is a matter of constant working with them. Perception of the differences, whether you can name them or not, is already in place.
 
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  • #32
Yes and no, kind of.

Everyone has a slightly different average body temperature and their actual body temperature varies over the course of the day, or even the course of the month. But everyone's average body temperature is close enough that a funtional 'normal' body temperature can be established by just rounding up to 37 degrees celsius (the average average body temperature is closer to 36.8).

Even though a person's average body temperature may be lower than the average person, they can still sense most significant differences in their own body temperature.

As long as everyone's vision range is pretty close to the norm and their ability to distinguish colors is pretty close to the norm and colors are described fairly generically (red, yellow, green, blue), how could they tell that it doesn't quite match the 'defined' wavelength for each color.

Functionally, there's almost no difference. The differences in color perception from person to person is very subtle and there's only a few people who's range is skewed just the right amount from the norm to have 'peculiar' quirks that only become evident towards the edge of an accepted range for a given color.

And, logically, considering just about everyone's average body temperature, voice, height, weight, ability to hear (perfect pitch, for example) are all slightly different, I'd be surprised to find out every human's vision is exactly the same. (Which probably makes me slightly biased towards believing the articles that say people's color perception varies.)
 
  • #33
Good stuff.
Consider the colour of water.
 

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