fairness vs skin colour

fairness and skin colour both are nouns.

Word	Noun	Adjective	Verb	Adverb
fairness	Yes	No	No	No
skin colour	Yes	No	No	No

As nouns, skin colour is a hypernym of fairness; that is, skin colour is a word with a broader meaning than fairness:

Other hypernyms of fairness include complexion, skin color.

fairness (noun)	skin colour (noun)
conformity with rules or standards	the coloring of a person's face
the property of having a naturally light complexion
the quality of being good looking and attractive
ability to make judgments free from discrimination or dishonesty