red-green color blindness vs red-green colour blindness

red-green color blindness and red-green colour blindness both are nouns.

Word	Noun	Adjective	Verb	Adverb
red-green color blindness	Yes	No	No	No
red-green colour blindness	Yes	No	No	No

As nouns, red-green color blindness and red-green colour blindness are synonyms defined as:

red-green color blindness and red-green colour blindness: confusion of red and green

Other synonyms of red-green color blindness include red-green dichromacy.

red-green color blindness (noun)	red-green colour blindness (noun)
confusion of red and green	confusion of red and green