Why does mixing yellow and blue pigments produce green rather than black or red? ?

If you look at any modern color wheel we can see that yellow, magenta, and cyan are the primary colors in a subtractive color model (their combinations most effectively portray all colors that our eyes can detect). To produce black, these 3 colors are combined (as in printers). We can also see that blue is opposite of yellow. And since blue is made by mixing magenta with cyan, mixing yellow with blue will contain yellow, magenta, and cyan. Then why does mixing yellow with blue paint produce green rather than black?

Secondly, relative to the positions of yellow and blue on the color wheel, green and red are identical. Then why does mixing yellow and blue produce green rather than red?

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  • Anonymous
    1 month ago

    Because yellow is not a primary color and mixing light and sometimes paint is additive, not subtractive. . The primary colors are red green and blue. Green plus blue = cyan or aquamarine. Green plus red = yellow. Cyan, yellow and magenta are secondary colors. 

    Mixing light and mixing pigments are two different things. Pigments absorb and reflect light. Mixing different colored pigments probably produced brown, not black or white. Different colors can have different hues, saturations, and intensities or brightness. 

     https://en.m.wikipedia.org/wiki/Additive_color. 

    • Danny W1 month agoReport

      I think mixing paint is always subtractive unless the paint emits light, like glow in the dark paint. 

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  • Dixon
    Lv 7
    1 month ago

    This is because pigments absorb light and only certain frequencies bounce off. When two pigments are mixed the absorbing is then the sum of both sets of absorption while the reflection is just the common reflection of both pigments. In the extreme case, mixing all colours of light gives white whereas mixing pigments of all colours gives black. 

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    • Dixon
      Lv 7
      1 month agoReport

      Yes, the colour wheel and colour triangle are more about mapping responses from the eye's colour sensors and how we process colour.

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