Magenta does not exist

Since we are able to experience magenta it exists. Anything we can experience and name exists. It is called a fact. If it did not exist it would not be possible to see it.

In the same way, and as nonsensically "scientists" argue that negative numbers exist, and if I remember correctly from "maths" they can even be multiplied together to create a positive result.

Magenta is not a fiction, but negative quantities are- hence "science"'s failure to advance civilization. Our mathematics is as fundamentally flawed as this contention.

It would be a test were a chameleon placed on a magenta surface. Not one "scientists" would consider, as they collectively consider that the chameleon is colour-blind, among other things.....

You are right to say that since we experience and name it, Magenta does exist. However, in the light spectrum, that colour is not present at all. Our brains create this colour when it is unable to process the light waves the eye is receiving. We are used to it being Magenta, but from a purely electric (the messages sent to our brains from our eyes) and biological, Magenta is a figment of our imagination...

Logic demands you decide. Can you say it exists because we experience it, but that our brains do not? And, that the brain then "creates" a new colour or hue which just happens to be the complimentary colour of green.

The rational mind pursuing this idea espouses as fact that magenta is the complimentary colour of green, a colour that also does not, according to you, therefore exist. You cannot have a complimentary colour of a non-existant one.