PenPixals - the default grey color is based on the default lambert shader. If you open the hypershade you will see lambert1. If you change the color of this lambert then all new objects will have the new color.
beyond that you have more options (I say more because I am not sure these are the only ones as there are lots of ways to do thing that I have not yet discovered)....
(1) change the color of the default lambert
(2) goto window>settings and preferences>color settings ... here you can change the color settings for anything in the maya ui
(3) for any object goto attribute editor>object>display>drawing overrides and enable overrides and make the color of that object anything you want
"If I have seen further it is by standing on the shoulders of giants." Sir Isaac Newton, 1675
Last edited by ctbram; 21-11-2011 at 04:58 PM.