Trichromy is thecolour theory by which any colour can be reproduced solely combining the threeprimary colours. It relies on humantrichromacy.
It is also referred tothe three colour process in photography. French histories of photography have claimed thatCharles Cros andDucos du Hauron simultaneously invented its application to photography around 1868,[1] though English histories of photography have claimed that it was first suggested byJ. C. Maxwell[2] and defectively demonstrated with the help ofThomas Sutton in 1861 (according to Maxwell himself, Sutton's widespread photochemistry wasn't sensitive enough to red and green light).
