It's true.

It is possible for women to be colorblind (if their father is colorblind and their mother is a carrier for the gene).

It is also possible for men to be tetrachromats if they have XXY genes (called Klinefelter syndrome).

This is not true. That women cannot have the congenital dichromacy (or anomalous trichromacy) that biological males commonly have is flat out wrong. A biological female can still be a protan or deutan, but the phenotype requires that both X chromosomes carry the recessive color vision-deficient alleles. Nevertheless, given that ~8% of all X chromosomes have such a gene regardless of sex, the incidence in the female population is still around half a percent, which is not insignificant.

Interestingly, one form of tetrachromacy in females actually has the same cause as color vision deficiency in some males (specifically anomalous trichromacy). From what I understand, only one X chromosome is active per cone cell, and which one is active is random. So, half of such a person's cone cells of one type are "normal" while the rest of that type are anomalous and have a slightly different peak wavelength. The net result is four different types of cone cells, i.e., tetrachromacy, which may have an incidence of more than 10% in females.

It’s not actually called quadchromatism but tetrachromatism.

I once knew a girl who was colorblind. Both her parents were too. It's rare but it can happen.

My daughter has the super eyes. She looooves pointing out different colors that "daddy can't see!" Lol.

I mentally reached for Ctrl+Shift+C

Black and blue!

oh no

Not as far as my eyes can tell. There is a slight difference.

I think it's a cultural thing. In uni we had to learn how to titrate to figure out concentrations and we had to look out for sudden color changes to figure out the concentration of a solution. Well, I had a professor who'd constantly revel in the fact that men often had trouble with this, but in a toxic way.

I know that women are constantly exposed to different tones and shades from using makeup. And I understood the assignment because I had studied some graphic design earlier and had to tell colors apart. Whet she didn't get was that I only needed a color reference all along! I literally did not know what color it was supposed to be and she didn't bother to explain lol