How can I set parameter for particle material?

As you can see in the top two pics, I have a “Color” Parameter that changes the particle material. But the problem is on the last pic you can see I can do it just fine with my normal actor material, but I have no way of referencing the particle system itself? I have nothing to put on Target since its a particle!

that emitter will never get spawned the way you have it. it need to come before the destroy actor. the way it runs right now it should give you an error.

To answer your question just drag off the return value of the spawn emitter node. This will give you a reference to the particle system.