I know from the art class I took in elementary school that there are primary colors and secondary colors. The primary ones being Red, Orange, Yellow, Green, Blue, and Purple.
So my question is why do we use red, green, and blue? Wouldn’t it make more sense to do every other color on the spectrum so that all colors in between could be mixed from them? Like Red, Yellow, and Blue?
In: Technology
The eye sees color in a spectrum, and there are relationships between the color sensing cells inside the eye. These cells allow the eye to sense a specific color space, the [CIE 1931 space](https://en.wikipedia.org/wiki/CIE_1931_color_space#CIE_xy_chromaticity_diagram_and_the_CIE_xyY_color_space). This chromaticity diagram shows how the relationship between color frequency and the eye’s perception of it. You could use many colors, but due to the shape of the space you can cover most of it with combinations only three colors if those colors are red, green, and blue. You can use other colors of light, and cover other parts of the space, but red, yellow, and blue only covers the lower right half of the space, so it’s not as good as red green and blue.
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