Anyone can adopt words used by others. There are no biological rules regarding who can use what words. There are no doubt many men who work in the fashion industry, or in the paint industry, where many different colors exist and are named.
Colorblindness affects no more than 8% of men with Northern European ancestry. Because the genetic causes are linked to a gene on the X chromosome, men are more likely to have the problem than women because men have only one X chromosome, while women have 2, which means that the 2nd X-chromosome can compensate for one that has the gene leading to colorblindness.
However, people who can see color are not “better” than people who cannot. That’s the point.
It isn’t taboo to point out inborn differences, although many of these differences are to the average individual and not to any particular individual. And there is “trouble” only when you attempt to argue that a “difference” makes a group of people “better”. It doesn’t.
Typo on the Y-axis.