Comment by jacobolus

By the way, "cyan" is a very poor name to use for #00ffff. The term "cyan" refers to the kind of slightly greenish blue used in 4-color printing (CMYK), and was just a Greek word for "blue" chosen to be a jargon word to avoid confusion with the English color name. It has a totally different color than the equal mixture of typical G and B primaries in a computer display.

Similarly, "magenta" is a poor name to use for #ff00ff. The term "magenta" is a jargon word for the slightly purplish printer's red, which was chosen to avoid confusion with the English word "red". It has a completely different than the equal mix of RGB R and B primaries.

("Red", "green", and "blue" are also very poor names for the RGB primaries, which are substantially orangish red, yellowish green, and purplish blue.)