When we go to mix paints, we find it’s difficult to pick the right paint combination — blue and yellow, or green and yellow, or green and blue? — to get the right shade of green, because green mixtures are different from other mixtures. We must know the material behavior of different pigments and paints, and which ones to choose for different purposes. When we mix them, we find that green mixtures follow curves rather than straight lines across a color wheel, and they often require three paints to mix accurately, rather than the two paints we’re been taught (“yellow and blue make green,” etc.). All these mixing complications are the reason there are so many premixed convenience green paints on the market — more premixed colors than for any other hue.
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