• ddh@lemmy.sdf.org
    link
    fedilink
    English
    arrow-up
    8
    arrow-down
    1
    ·
    8 months ago

    The first one seems OK as it’s the basis of CMYK colour printing? Obviously missing black of course though.

    • jqubed@lemmy.world
      link
      fedilink
      arrow-up
      41
      arrow-down
      1
      ·
      8 months ago

      The color people will tell you that cyan and magenta do not equal red and blue. My university advisor tricked me into taking a 400 level class from the college of art and design on color theory. Really interesting class but an insane amount of work. Very early on the professor told us to throw out any book that identified red, yellow, and blue as the primary colors. It’s red, green, blue for light or cyan, magenta, yellow for pigment.

      • Sternhammer@aussie.zone
        link
        fedilink
        English
        arrow-up
        21
        ·
        8 months ago

        Yes, additive colour theory is based on red, green and blue (RGB). These are the colours you see if you look at your TV screen very closely.

        Subtractive colour theory uses cyan, magenta and yellow. In printing black, abbreviated ‘K’, is added for contrast—CMYK. These are the inks used to print the dots you see if you look closely at a magazine photo.

        I think people are confused by this because they’re taught a bastardised version of subtractive colour theory, using red, blue and yellow, at a very early age.

      • rebelsimile@sh.itjust.works
        link
        fedilink
        arrow-up
        8
        arrow-down
        5
        ·
        8 months ago

        Red/yellow/blue are the primary colors for paints (as distinct from dyes/pigments, that’s CMY(k) and as distinct from light, that’s RGB).

        • owenfromcanada@lemmy.world
          link
          fedilink
          English
          arrow-up
          5
          arrow-down
          1
          ·
          8 months ago

          Why would paints have a different primary palette than dyes or pigments? They’re all subtractive, so the primary colors are CMY.

          The red/yellow/blue is a lie!

          • rebelsimile@sh.itjust.works
            link
            fedilink
            arrow-up
            1
            arrow-down
            3
            ·
            8 months ago

            Are you asking me why is paint the way it is? I don’t know, take it up with nature, but stop spreading misinformation.

            • owenfromcanada@lemmy.world
              link
              fedilink
              English
              arrow-up
              4
              ·
              8 months ago

              I’m saying that, with respect to color reproduction, paints work exactly the same as dyes and pigments. You can’t make magenta paint from red, blue, and yellow. So the “primary colors” of paint are actually CMY.

              • captainlezbian@lemmy.world
                link
                fedilink
                arrow-up
                1
                arrow-down
                1
                ·
                8 months ago

                Yeah it’s just historically been very difficult to make magenta and cyan paints so ryb has stood in for cmy

    • owenfromcanada@lemmy.world
      link
      fedilink
      English
      arrow-up
      9
      ·
      8 months ago

      I see you’ve been tricked by their lies. Blue is sorta close to cyan, and red is kinda close to magenta, but they’re not the same.

      If someone tells you that you can make any other color from RYB, ask them to make magenta. Doesn’t work.