Either dark skin or light skin. Like a person has a preference, but they do not detract or belittle other colors and do not exclude them, they just favor a certain color. Would it be colorism?

I dey come make I eat finish

It's just individual preferences
It's now when you despise or act favourably only towards a particular skin tone that it can be termed as "colourism".

The poster above me has said it all

Well, colorism would be an overstatement in this case as what is at play is simply preference and not outright hostile prejudice. This preference of skin tone almost only comes up when matters of attraction and beauty are discussed. I don't think it is serious enough to be a real threat to darkskin ladies.

I just find it curious that a lady would be deemed beautiful because of her skin tone. Simplistic, to say the least. Probably evidence of a serious hangover from colonialism.

Whatever happened to shape, size and proportion of facial features and delicate curves? Those are the real markers of human beauty. (IMO)

I have seen many fair chicks with strong unladylike jaws, arms, gait and cheekbones referred to as beautiful. I strongly suspect that if said ladies were dark, the same observers would call them ugly. So you see the conceit. Skin colour should not be a parameter for beauty. Any such preference is not colorism but certainly borders on it.

What would this description be:

Heera is the plural of Heer’, meaning a young, beautiful, fine woman with white complexion and intensely black eyes (iris).

Just a preference?