How to change colour of display in visualization module

 

Hi

I am doing a Dynamic Temp-Displacement analysis of a tube rolling operation where three rollers (analytical rigid) are there 120 degrees apart (say XY plane) and axially staggered (Z axis). In visualization module using colour code option I am trying to give different colour to different rollers (Colour code: All; By: Part Instance -option) and I am not able to change the colour. Is there any way to assign colours to different rollers so that it will be easy to keep track which is which roller.