Color wise, as in red, silver and blue? or actually making it look like optimus prime? i lost the pen to my tablet so line art has been pretty simplified for the moment xD
*edit* if you just want the colors i figured those out- head=blue, light blue eyes, silver nose and inner ear. body= half red, half silver. paws=blue w/silver pads. Tail=blue w/silver tip. And i was thinking a dark gray for the ball xD