From FreeSpace Wiki
Change IFF Color (Action operator) Sets the specified ship(s) or wing(s) apparent color. Takes 6 or more arguments... 1: Name of the team from which target is observed from. 2: Name of the team of the observed target to receive the alternate color. 3: Red color (value from 0 to 255). 4: Green color (value from 0 to 255). 5: Blue color (value from 0 to 255). Rest: Name of ship or wing to change team status of.
- This SEXP could very well be called as fake-iff, which better represents what it can be used for.