All you should have to do is select the asslembly in the design tree and hitt the edit color button (right next to the rebuild button) Select your color and apply.
I am making a overlay of an old part & a new part, I put them into an
> assy & inserted a view into a drawing sheet. Is there a way to change > the color of one
> of the parts in the drawing? Is there a better way to do this in SWX > or should I
> save as a dwg and do it in AutoCRAP?
>
> Thanks
>
> CAD ROB