• ddh
      link
      fedilink
      English
      86 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
        416 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
          link
          fedilink
          English
          216 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
          86 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
            56 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!

              • @owenfromcanada@lemmy.world
                link
                fedilink
                English
                46 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.

      • @owenfromcanada@lemmy.world
        link
        fedilink
        English
        96 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.

      • @meeshen@vegantheoryclub.org
        link
        fedilink
        66 months ago

        Black in CMYK is not strictly necessary, you can absolutely make black out of CMY, but the separate ink gets added since black is such a regular occurence it’s simply cheaper to not mix it out of the other colors.

      • ReallyZen
        link
        fedilink
        36 months ago

        In CMY (printing) you get black by adding them all. In RGB (lighting) you get white