For example, [this colour wheel has 12 sections](https://www.spectrumnoir.com/wp-content/uploads/2017/04/Colour-Wheel-2.jpg) and performs a full ‘loop’ for lack of a better term (i.e. starts at red, traverses to the polar opposite, and returns the natural way). We can see every one of these clearly, and every colour in between those two colours as it’s simple a mixture, or a mixture of a mixture, or so on. So how can a colour exist outside this wheel?
In: Biology
Because our eyes have 3 color receptors – red, green and blue. While those receptors, when combined, can perceive millions of colors they don’t always pick up extremely subtle color shifts.
If you want to enjoy something weird about color try imagining bluish yellow, or yellowish blue. You can’t. There are lots of videos on YouTube about blue-yellow, a pretty fun hole to jump down on a boring day.
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