I should have been more succinct here, as cyan is loosely described in the texts as a mixture of blue and green (two frequencies) or a color somewhere between g

I should have been more succinct here, as cyan is loosely described in the texts as a mixture of blue and green (two frequencies) or a color somewhere between green and blue. The author could have avoided confusion by selecting say 'green'. However, there's no confusion about purple - in the video shown as magenta instead of violet as it is not on the spectrum of true colors (it being a mixture of blue and red): https://en.m.wikipedia.org/wiki/Magenta https://en.m.wikipedia.org/wiki/Magenta.