James Arvin shares a little script he create that will allow you to select or randomize the color of all the control objects on a rig in Autodesk Maya all at once.
The Color Control Script provides a floating panel providing simple controls for individual colors, or randomizing the colors of the entire rig controls easily.
This script will randomily change all of your control’s colors for a fresh new look
James notes that you can hit randomize as many times as you like until you are satisfied, or alternatively you can have control with changing the individual controls to a color you like without effecting the other controls.
Check out the Color Control Script for Maya here.