redness vs chrome red

redness and chrome red both are nouns.

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

As nouns, chrome red is a hyponym of redness; that is, chrome red is a word with a more specific, narrower meaning than redness:

redness: red color or pigment; the chromatic color resembling the hue of blood
chrome red: a red pigment used in paints; basic lead chromate

redness (noun)	chrome red (noun)
red color or pigment; the chromatic color resembling the hue of blood	a red pigment used in paints; basic lead chromate
a response of body tissues to injury or irritation; characterized by pain and swelling and redness and heat