Turkey red vs redness

Turkey red and redness both are nouns.

Word	Noun	Adjective	Verb	Adverb
Turkey red	Yes	No	No	No
redness	Yes	No	No	No

As nouns, redness is a hypernym of Turkey red; that is, redness is a word with a broader meaning than Turkey red:

Turkey red: a bright orange-red color produced in cotton cloth with alizarine dye
redness: red color or pigment; the chromatic color resembling the hue of blood

Other hypernyms of Turkey red include red.

Turkey red (noun)	redness (noun)
a bright orange-red color produced in cotton cloth with alizarine dye	red color or pigment; the chromatic color resembling the hue of blood
	a response of body tissues to injury or irritation; characterized by pain and swelling and redness and heat