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Chebucto Regional Softball Club

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  3. RGB codes use light mixing rules.
A forum for discussing and organizing recreational softball and baseball games and leagues in the greater Halifax area.

RGB codes use light mixing rules.

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  • myrmepropagandistF myrmepropagandist

    RGB codes use light mixing rules. This is fine, can take some getting used to if you are used to pigment.

    RYB would be a primary color code scheme. It wouldn't cover the same range of colors. I'm thinking about how one would code a conversion function between the two from "first principals" ... I think RYBB would allow the same range of colors if "B" is black.

    ? Offline
    ? Offline
    Guest
    wrote last edited by
    #4

    @futurebird CMYK Cyan (blue) Magenta (red) Yellow Black.

    myrmepropagandistF 2 Replies Last reply
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    • ? Guest

      @futurebird CMYK Cyan (blue) Magenta (red) Yellow Black.

      myrmepropagandistF This user is from outside of this forum
      myrmepropagandistF This user is from outside of this forum
      myrmepropagandist
      wrote last edited by
      #5

      @retech

      That's for printing? And so it's also confusing. The color system most people learn is RYB for some reason. I don't know why.

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      • ? Guest

        @futurebird CMYK Cyan (blue) Magenta (red) Yellow Black.

        myrmepropagandistF This user is from outside of this forum
        myrmepropagandistF This user is from outside of this forum
        myrmepropagandist
        wrote last edited by
        #6

        @retech

        This is coming from working with students who learn about "primary colors" in art class, but then in tech I have this other system and it confuses them a little. (they adapt)

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        • Pete Alex Harris🦡🕸️🌲/∞🪐∫P Pete Alex Harris🦡🕸️🌲/∞🪐∫

          @futurebird
          I think it'd miss some of the brighter colours. Red and Blue aren't really primary colours for paint, which is why printing uses CMYK

          (edited: wait of course you know that. Nearly did a full-on mansplain there!)

          So would this be light mixing with RYB and some combination rule that isn't just addition and subtraction?

          myrmepropagandistF This user is from outside of this forum
          myrmepropagandistF This user is from outside of this forum
          myrmepropagandist
          wrote last edited by
          #7

          @petealexharris

          I'm trying to help students who learn RYB understand light mixing with less difficulty.

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          • Ben Lubar (any pronouns)B Ben Lubar (any pronouns)

            @futurebird I think blue having the same first letter as black is why they refer to black as "key" in CMYK

            myrmepropagandistF This user is from outside of this forum
            myrmepropagandistF This user is from outside of this forum
            myrmepropagandist
            wrote last edited by
            #8

            @ben

            Makes sense. I think introducing CYMK to the mix would just make it more confusing?

            Also I want to puzzle this out. But I don't understand why so many people are taught that Red Yellow and Blue are the primary colors?

            That's the real issue. I will bother the art teachers tomorrow.

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            • myrmepropagandistF myrmepropagandist

              RGB codes use light mixing rules. This is fine, can take some getting used to if you are used to pigment.

              RYB would be a primary color code scheme. It wouldn't cover the same range of colors. I'm thinking about how one would code a conversion function between the two from "first principals" ... I think RYBB would allow the same range of colors if "B" is black.

              Luci ScissorsB This user is from outside of this forum
              Luci ScissorsB This user is from outside of this forum
              Luci Scissors
              wrote last edited by
              #9

              @futurebird what you are after is called CMYK

              Luci ScissorsB 1 Reply Last reply
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              • Luci ScissorsB Luci Scissors

                @futurebird what you are after is called CMYK

                Luci ScissorsB This user is from outside of this forum
                Luci ScissorsB This user is from outside of this forum
                Luci Scissors
                wrote last edited by
                #10

                @futurebird if it’s less confusing you can call C “blue” and M “red”;

                i can explain why kindergarteners are taught red yellow and blue but it it’s sort of my big infodump thing. hard to type out here. pigment paints are a bit different from both light mixing and printer’s ink mixing

                Luci ScissorsB 1 Reply Last reply
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                • Luci ScissorsB Luci Scissors

                  @futurebird if it’s less confusing you can call C “blue” and M “red”;

                  i can explain why kindergarteners are taught red yellow and blue but it it’s sort of my big infodump thing. hard to type out here. pigment paints are a bit different from both light mixing and printer’s ink mixing

                  Luci ScissorsB This user is from outside of this forum
                  Luci ScissorsB This user is from outside of this forum
                  Luci Scissors
                  wrote last edited by
                  #11

                  @futurebird in the big girl painting classes to get a full range of colours you actually need at least two of each, a purple leaning red (alizarin crimson) orange leaning (cadmium red) , purplish blue (ultramarine blue) greenish (pthalo blue), cadmium yello, burnt umber, burnt sienna, then we have dioxazine purple which has an intensity you cannot get by mixing any of the blues or reds; and greens that you cannot get with the blues and yellows

                  and each of these mix in strange and confusing ways: alizarine is strong, use only a little. yellows are weak.. etc

                  to understand why you need spectral vision and microscopic vision to see the mechanics of the pigment mix

                  SemitonesS 1 Reply Last reply
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                  • Luci ScissorsB Luci Scissors

                    @futurebird in the big girl painting classes to get a full range of colours you actually need at least two of each, a purple leaning red (alizarin crimson) orange leaning (cadmium red) , purplish blue (ultramarine blue) greenish (pthalo blue), cadmium yello, burnt umber, burnt sienna, then we have dioxazine purple which has an intensity you cannot get by mixing any of the blues or reds; and greens that you cannot get with the blues and yellows

                    and each of these mix in strange and confusing ways: alizarine is strong, use only a little. yellows are weak.. etc

                    to understand why you need spectral vision and microscopic vision to see the mechanics of the pigment mix

                    SemitonesS This user is from outside of this forum
                    SemitonesS This user is from outside of this forum
                    Semitones
                    wrote last edited by
                    #12

                    @bri_seven @futurebird yessss I want a class where I can mix pigments and get a brown mess, then look in a microscope and see colors again.

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                    • myrmepropagandistF myrmepropagandist shared this topic
                    • myrmepropagandistF myrmepropagandist

                      RGB codes use light mixing rules. This is fine, can take some getting used to if you are used to pigment.

                      RYB would be a primary color code scheme. It wouldn't cover the same range of colors. I'm thinking about how one would code a conversion function between the two from "first principals" ... I think RYBB would allow the same range of colors if "B" is black.

                      llewellyL This user is from outside of this forum
                      llewellyL This user is from outside of this forum
                      llewelly
                      wrote last edited by
                      #13

                      careful, @futurebird . The galaxy of color spaces contains many strange new worlds and you may fall through the wormhole into the gamma quadrant and voyage for many years without finding a way home ...

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