luridness vs skin colour

luridness and skin colour both are nouns.

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

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

luridness: unnatural lack of color in the skin (as from bruising or sickness or emotional distress)
skin colour: the coloring of a person's face

Other hypernyms of luridness include complexion, skin color.

luridness (noun)	skin colour (noun)
the quality of being ghastly	the coloring of a person's face
unnatural lack of color in the skin (as from bruising or sickness or emotional distress)
the journalistic use of subject matter that appeals to vulgar tastes