While Tom is for the most part correct, felt I had to point out that there is a very limited ability to recolor VRML in Chimera.  If the VRML has no embedded color directives then it will use the model color, which can be changed.  Doesn't really impact the point that Tom is making.

--Eric

                        Eric Pettersen

                        UCSF Computer Graphics Lab

                        http://www.cgl.ucsf.edu