4 ms·

When they're well into the double-digit percentage of the population, I guess. (Not just technically tetrachromats but actually able to discern a 4-dimensional

When they're well into the double-digit percentage of the population, I guess. (Not just technically tetrachromats but actually able to discern a 4-dimensional color space). Since they can perceive more colors, it's never an accessibility issue, so it's far more important to accommodate dichromats, and that's already very hard because we can't tell how a person with a different set of cones would perceive a particular color just by looking at it. Also, we already have a color model that can't reproduce true cyan as perceived by "regular" trichromats, and so far that hasn't been a real issue.

raxxorrax 7y ago
What is the problem with cyan? That there is no adequate color space that can create more or less cyan? I would think it is just a mix of green and blue, no? Is the same true for magenta as well? Is it a problem to convert between RGB and CMYK?
- OscarCunningham 7y ago
  RGB only spans a triangle within the full colour space https://en.wikipedia.org/wiki/Wide-gamut_RGB_color_space#/media/File:CIExy1931_AdobeWGRGB.png https://en.wikipedia.org/wiki/Wide-gamut_RGB_color_space#/me.... So the cyan generated by blue and green isn't as saturated as it could be.
  - raxxorrax 7y ago
    I see, thank you. I took a long look at the diagram and could not discern a difference between colors within and outside the triangle until it alarmingly slowly dawned on me. Would really like to have a comparison between a monitor that can display those colors now. Apparently there are some more expensive monitors that can display an extended palette.
  - mncharity 7y ago
    For anyone puzzled by the graphic's D50 whitepoint marker being in yellow, offset from the color background's whitepoint (the white intersection of the 3 "arms"), yeah, that's wrong. There's historically been a lot of broken chromaticity code out there, and associated flawed diagrams.

raxxorrax 7y ago

What is the problem with cyan? That there is no adequate color space that can create more or less cyan? I would think it is just a mix of green and blue, no? Is the same true for magenta as well? Is it a problem to convert between RGB and CMYK?

OscarCunningham 7y ago
RGB only spans a triangle within the full colour space https://en.wikipedia.org/wiki/Wide-gamut_RGB_color_space#/media/File:CIExy1931_AdobeWGRGB.png https://en.wikipedia.org/wiki/Wide-gamut_RGB_color_space#/me.... So the cyan generated by blue and green isn't as saturated as it could be.
- raxxorrax 7y ago
  I see, thank you. I took a long look at the diagram and could not discern a difference between colors within and outside the triangle until it alarmingly slowly dawned on me. Would really like to have a comparison between a monitor that can display those colors now. Apparently there are some more expensive monitors that can display an extended palette.
- mncharity 7y ago
  For anyone puzzled by the graphic's D50 whitepoint marker being in yellow, offset from the color background's whitepoint (the white intersection of the 3 "arms"), yeah, that's wrong. There's historically been a lot of broken chromaticity code out there, and associated flawed diagrams.