color-blind person

English Thesaurus

1. a person unable to distinguish differences in hue (noun.person)

hypernym	:	individual, mortal, person, somebody, someone, soul,
definition	:	a human being (noun.tops)

hyponym	:	monochromat,
definition	:	a person who is completely color-blind (noun.person)

hyponym	:	dichromat,
definition	:	a person with any of the various forms of dichromacy (noun.person)