Why do women distinguish colors better than men?

She- Plum, Indigo, Aubergine, Lilac, Lavender.
He-  Purple.
If you are male and always end up in a fight with your girlfriend about identifying the colours then it's not your fault my friend.Want to know why? here's the answer-

Your retina contains two types of photoreceptors, rods and cones. The rode is more sensitive than cones but they are not sensitive to colour. Rods can function in less intense light than cones.
The rear part of the eyeball's membrane contains 7 million cone cells.It's because of these cells that we are able to distinguish between colours. Information about these colour cells is contained in our X chromosome. Females have two of these chromosomes (XX)  while men have only one (XY). This is the reason why females can distinguish more colours and shades.

Researchers from Brooklyn and Hunter Colleges of the City University of New York compared the vision of men and women. The volunteers were required to describe colours shown to them across the visual spectrum it became obvious that the colour vision of men was shifted, and that they required a slightly longer wavelength to experience the same hue as women.

After that, an image of light and dark bars was used to measure contrast-sensitivity functions (CSF).
Contrast sensitivity function is a measurement of a persons ability to detect low contrast pattern (usually decreasing shades of black to grey). A person with good contrast sensitivity can safely drive at night. This time performance of men was better than women.

So we can say that women are better at distinguishing colours and shades while men are better when it comes to intensity. Men notice details better than women.