If, however, all the hues that are visible to you can be matched by mingling only two of these primary colors, and the addition of the third color does not make any noticeable difference, then your color vision is defective.
Ikiwa, hata hivyo, hues zote zinazoonekana kwako zinaweza kuendana na kuchanganya rangi mbili tu za rangi hizi za msingi, na kuongeza ya rangi ya tatu haifanyi tofauti yoyote inayoonekana, basi maono yako ya rangi yana kasoro.