my reasoning: the actual colors we can see -> the wavelengths that we can extrapolate to -> basically extrapolated wavelengths plus an ‘unpure-ness’ factor -> not even real wavelengths (ok well king blue and maybe lavender if I’m being generous could be)

  • AdrianTheFrog@lemmy.worldOP
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    18 days ago

    look at this chart, and look for the pink. It isn’t there, because pink isn’t real

    I should have excluded king blue and violet tho, those are actually real, mb

    • thedirtyknapkin@lemmy.world
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      18 days ago

      look at this guy who only understands hue LMAO

      light has three parts that are needed to define color. hue, saturation, luminance. the difference between orange and brown is saturation. a thing that affects color visually undeniably. you can’t just throw a hue chart at us and pretend the other parts don’t exist.

      you can achieve this result through rgb color mixing by controlling percentages. for example magenta is going to be like 50% red. and 50% blue. pink is just 20% red. your chart only shows colors at 100% intensity and additive mixing. color behaves differently whether you’re mixing light or pigments. light will combine to create white. you literally have to combine the different frequencies. this is additive mixing and where rgb is used. there is also subtractive mixing where color is defined by what frequencies are reflected and which are absorbed. when you mix all the colors together this way you get black, because all frequencies will be absorbed. this method uses ryb as its primaries.

      so this all really depends on whether we’re looking at additive or subtractive. you seem to be a little confused on your color swatches there. following additive mixing, like you seem to be, you should say white is real and black isn’t. though neither is true. they’re just 100,100,100 and 0,0,0 respectively.

      -a professional colorist and videographer

      • AdrianTheFrog@lemmy.worldOP
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        18 days ago

        I’ll start by saying the computer rgb and hsl models are an abstraction matching how we perceive light that doesn’t include any other spectral information that we can’t see

        in terms of wavelengths of light, pink is not a hue, unlike other fully saturated colors it does not have a wavelength to go along with it

        yes, you can combine red and blue to make pink, but then you’re looking at the wavelengths of red and blue and not those of pink (because pink doesn’t have a wavelength)

        any color that isn’t red, green, or blue could be any one of an unlimited number of spectrums that would produce the same perceived result, but any fully saturated color other than pink does have one single wavelength that goes along with it

        like I said above, hue is analogous to wavelength, saturation is analogous to the ‘unpure-ness’ of the wavelengths, and value/luminance is analogous to the quantity of those wavelengths - and pink is one that breaks this pattern

        • thedirtyknapkin@lemmy.world
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          18 days ago

          oh my God, you don’t make pink by combining red and blue, you make pink by decreasing the intensity of the red.

          my whole point was that color is a percieved thing. it is more than wavelength. you are trying to say the only thing that can be defined as color is the wavelength of light. there’s more to it than that. like, congrats you proved that hue is not the only thing that defines color. well done. unfortunately reality exists. we can go and point to red, pink, and purple and differentiate then mathematically with scientific tools. to say that isn’t color is incorrect and pedantic.

          hue is just frequency. color includes intensity and color mixture. if you want to say that color is just a percieved experience and isn’t real then sure maybe you have a point, but that means all color.

          what you really mean is that pink and other colors aren’t on the rainbow. that doesn’t make them not real.

          and yes hue, saturation, and luminance are abstractions. much like acceleration is an abstraction of distance over time over time. that’s why i also defined it by color mixing terms. i can pull out a spectrum analyzer right now and show you saturation and luminance with data.

          • AdrianTheFrog@lemmy.worldOP
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            18 days ago

            I guess you could call this pink but I would normally think of it more in the magenta range of or

            in the c/196 banner there is more red than green, meaning the fully saturated version wouldn’t correspond to a real wavelength

            anyways, I’m not trying to say that those colors don’t exist because obviously we can see them, just that they show the weaknesses of human color perception

            • thedirtyknapkin@lemmy.world
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              18 days ago

              oh don’t worry, there’s multiple specific ways to define colors. you can go out and buy a book that literally just has thousands of defined tones and their specific names. chartreuse has a hex code and a specific rgb value for example. you’re right though, laymen don’t have the right vocabulary to define colors specifically.

              the only real point you have here is that color is defined by human perception. even the colors you call real are just abstractions based on what range of wavelength is visible to human perception.

              all colors are defined be human perception. the only way to remove yourself from that is to use strict wavelengths. or you can realize you are a human and the only meaningful way to define this is by our perception.

              • AdrianTheFrog@lemmy.worldOP
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                18 days ago

                sometimes suddenly you can’t pretend color is just red green and blue, once you get diffraction or are using a spectral renderer or smth, but yea it works 99% of the time

                • thedirtyknapkin@lemmy.world
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                  18 days ago

                  I’m having trouble following you here, but it sounds like you’re just saying that the other colora are derived from mixing the primaries. that doesn’t make the colors you get from that a mental illness??

                  is mud not real because it’s just wet dirt? is steel not real because it’s just iron with added carbon? that’s silly.

                  if your only point is that non primary colors are made by mixing primary colors then congrats, you’ve taught a kindergarten lesson very badly.

                  • Fushuan [he/him]@lemm.ee
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                    17 days ago

                    Aren’t primaries magenta, cyan and yellow? I was under the impression that the is a thing because monitors emit light, but in nature surfaces reflect it, hence the primari colors “shidt”.

                    I agree with you, the other commenter is cooked as hell to insist that their limited understanding of colours is absolute.

                  • AdrianTheFrog@lemmy.worldOP
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                    18 days ago

                    I was saying there are times when you can’t treat other colors as being made form primaries, specifically when the spectrum will later be separated. (by diffraction or by materials with a complex spectral response)

                    for example, you could have 2 clear yellow sheets that look identical when placed in front of a full spectrum white light. However, one lets through red and green and one lets through yellow wavelengths. Suddenly now they behave very differently when you put them in front of a green light - the one that only lets through yellow looks black and the one that lets through green looks green.

                    going back to the part where I labeled yellow as a slippery slope, its because we can’t really see whether there are yellow wavelengths or not in examples like these or others

                    also, a fun side note, you can actually see diffraction patterns by looking through any aperture (but a diffraction grating will make it more obvious) and these respond noticeably differently to all wavelengths and look wrong if you only consider the primaries. So, technically, if you’re looking at any scene through any sort of camera/lens system/eye, you can’t treat the scene as only having 3 primaries as it would look (imperceptibly) different if you considered all wavelengths. Actually, recreating this video in Python is what got me thinking about this. If you look at a very bright white point of light made of very specifically only red green and blue wavelengths you might actually be able to see this, it should look like

                    instead of

                    (its very subtle and you might need to zoom in but it looks a lot more noisy)