source files: xgtm.[ch], term/*.trm, gtplot.h
(GT-SET-COLOR '(0 1 0)) (SEND <gtm:terminal> :SET-COLOR '(0 1 0)) ; Selects green.
Set current color, from a list '(R G B) of floats or ints, each in the range zero to one.
This is a new-style 3D call. The color set has nothing to do with the 2D plotting calls.