In the Indiana Jones set Temple of the Crystal Skull, there has been one additional color: 38 Dark Orange, a fairly old color that was chosen to represent the Mesoamerican natives from the movie.
Wow, now I understand why the call you the "Colour Master"!
And yes, "38 Dark Orange" is the fourth skin-tone currently in use. They used it for the fictitious Ugha Warriors from South America. At first glance I definitely thought it was far too intensely reddish. For reference, here is a picture of young hunters-in-training from the Yanomami Tribe.
If my kids ask, I will just tell them that these minifigs have covered themselves from head-to-toe with red-ochre clay body paint!
Edited by The Real Indiana Jones, 01 December 2010 - 08:00 AM.