a man who is unable to distinguish one or several chromatic colours.

a man suffering from achromatopsia, unable to distinguish colours of the spectrum.

a woman who is unable to distinguish one or several chromatic colours.

a woman suffering from achromatopsia, unable to distinguish colours of the spectrum.

inability to distinguish one or several chromatic colours, independent of the capacity for distinguishing light and shade; colour-blindedness.

complete inability to distinguish colours of the spectrum, with all objects appearing as shades of gray, black, and white, varying only as to lightness and darkness; achromatopsia.

a variety of nail dye plant, Barleria buxifolia (var. roseaflora) of Acanthaceae family(?).