factitious \fak-TISH-uhs\, adjective:
1. Produced artificially, in distinction from what is produced by nature.
2. Artificial; not authentic or genuine; sham.
The extreme arbitrariness of this color in relation to the "real" colors of the human figure indicates that Picasso's initial analysis turned on a redesignation of the idea of local color, displacing it from the surfaces of the natural world to the wholly factitious veneers in the world of cultural artifacts.
-- David Carrier, "Modernist art and its market", Art Journal, Winter 1998