I was looking in the instructions for how to set the RGB coefficient to replace the color, and tried manually. I see that there is an option. But I didn't understand how to do it in the event editor. I can only hide and show objects.
RGB coefficient can be set via the editor properties
or from standard commands
Here is a sample
http://ugken.com/ext/Spine/rgb_sample.zip
This function requires that you first select the target of the change with Select_Slot.
http://ugken.com/ext/Spine/rgb_slot.zip