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> I'd love to code up a machine learning project that showed the user many color combinations That would be fine, so long as you don't use an RGB display to di

> I'd love to code up a machine learning project that showed the user many color combinations That would be fine, so long as you don't use an RGB display to display those colors. The RGB color space is severely limited when compared to the colors a person can see. This becomes obvious as one plots color spaces on a CIE 1931 diagram. Here's a simple tool to see some of this (recommendation: move "system gamut contrast" slider to 50%). Select a working color space from the pulldown to see how much of the visible range it encloses (or discards). https://demonstrations.wolfram.com/CIEChromaticityDiagram/ https://demonstrations.wolfram.com/CIEChromaticityDiagram/ A typical REC709 color space throws away over half the colors a person can see. In other words, as I said, using a monitor to run color experiments can be a serious mistake. Color Science can be strangely complex. There is a company trying to push the envelope in display technology and encourage industry to move primaries beyond RGB. The results, based on prototypes, can be impressive: https://6pcolor.com/ https://6pcolor.com/ Disclosure: We have done color science, software and hardware consulting for 6P.

nine_k 3y ago
If not under an NDA, what are they using to represent the super-bright reds and greens? Lasers? And, more interestingly, the super-greens and super-blues that are very dark and highly-intense? (I worked for a printing house and I know that some colors are outside RGB and outside CMYK, so they are printed as spot colors. There is a ton of Pantone colors you cannot mix, and must add from special one-color cans, like the Reflex Blue. Some customers want them badly.)
- zokier 3y ago
  RGB lasers are already a thing for high-end projection. They have one picture of projectors on their website[1], I'll guess they are modified off-the-shelf ones with custom lasers. You can just barely make out the brand Christie on them, and that is a manufacturer who have laser projectors[2]. Considering their main focus is in the new primaries, it wouldn't surprise me if they just used the standard lasers for red and green, maybe even blue; sourcing suitable high-power lasers in some specific wavelengths might not be that easy. Besides projectors, the other thing they seem to have done is a "dvled" (direct view) display, stuff thats maybe most familiar as those outdoor signage displays. This press release[3] has one blurry picture of their four primary led display [1] https://6pcolor.com/about/ https://6pcolor.com/about/ [2] https://www.christiedigital.com/about/display-technology/laser-projection/rgb-laser-projection/ https://www.christiedigital.com/about/display-technology/las... [3] https://www.einnews.com/pr_news/571752479/6p-color-demonstrates-double-the-colors-approach-for-electronic-displays https://www.einnews.com/pr_news/571752479/6p-color-demonstra...
zokier 3y ago
It's funny that they call their tech "Full Color Range™" while it still catches smaller part of gamut that some industry standard colorspaces (ACES 2065-1) do with three primaries :) Of course improving capture or display tech is good still, I'm just less convinced of the idea of trying to upend the whole industry
- robomartin 3y ago
  > smaller part of gamut that some industry standard colorspaces (ACES 2065-1) do with three primaries The ACES 2065-1 primaries are not realizable, they are imaginary. In other words, one cannot make a display capable of displaying these primaries. They are mathematical tools enclosing the entire CIE 1931 space.
  - zokier 3y ago
    Yes, but of course it is debatable how relevant realizability is in practice; we have long history of using displays that have significantly smaller gamuts than whatever nominal colorspace being used. Was rec2020 realizable in practice when it was created? I'd bet no.
    - robomartin 3y ago
      Sorry, I think you might be mixing up a couple of ideas. In this context, not-realizable means “not real”. Rec 2020 primaries have always been realizable. ACES AP0 primaries only exist mathematically for the purpose of enclosing the entire “wedge” of visible colors.

nine_k 3y ago

If not under an NDA, what are they using to represent the super-bright reds and greens? Lasers? And, more interestingly, the super-greens and super-blues that are very dark and highly-intense? (I worked for a printing house and I know that some colors are outside RGB and outside CMYK, so they are printed as spot colors. There is a ton of Pantone colors you cannot mix, and must add from special one-color cans, like the Reflex Blue. Some customers want them badly.)

zokier 3y ago
RGB lasers are already a thing for high-end projection. They have one picture of projectors on their website[1], I'll guess they are modified off-the-shelf ones with custom lasers. You can just barely make out the brand Christie on them, and that is a manufacturer who have laser projectors[2]. Considering their main focus is in the new primaries, it wouldn't surprise me if they just used the standard lasers for red and green, maybe even blue; sourcing suitable high-power lasers in some specific wavelengths might not be that easy. Besides projectors, the other thing they seem to have done is a "dvled" (direct view) display, stuff thats maybe most familiar as those outdoor signage displays. This press release[3] has one blurry picture of their four primary led display [1] https://6pcolor.com/about/ https://6pcolor.com/about/ [2] https://www.christiedigital.com/about/display-technology/laser-projection/rgb-laser-projection/ https://www.christiedigital.com/about/display-technology/las... [3] https://www.einnews.com/pr_news/571752479/6p-color-demonstrates-double-the-colors-approach-for-electronic-displays https://www.einnews.com/pr_news/571752479/6p-color-demonstra...

zokier 3y ago

It's funny that they call their tech "Full Color Range™" while it still catches smaller part of gamut that some industry standard colorspaces (ACES 2065-1) do with three primaries :) Of course improving capture or display tech is good still, I'm just less convinced of the idea of trying to upend the whole industry

robomartin 3y ago
> smaller part of gamut that some industry standard colorspaces (ACES 2065-1) do with three primaries The ACES 2065-1 primaries are not realizable, they are imaginary. In other words, one cannot make a display capable of displaying these primaries. They are mathematical tools enclosing the entire CIE 1931 space.
- zokier 3y ago
  Yes, but of course it is debatable how relevant realizability is in practice; we have long history of using displays that have significantly smaller gamuts than whatever nominal colorspace being used. Was rec2020 realizable in practice when it was created? I'd bet no.
  - robomartin 3y ago
    Sorry, I think you might be mixing up a couple of ideas. In this context, not-realizable means “not real”. Rec 2020 primaries have always been realizable. ACES AP0 primaries only exist mathematically for the purpose of enclosing the entire “wedge” of visible colors.