luridness vs skin color

luridness and skin color both are nouns.

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

As nouns, skin color is a hypernym of luridness; that is, skin color 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 color: the coloring of a person's face

Other hypernyms of luridness include complexion, skin colour.

luridness (noun)	skin color (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