Right approach to change materials of actors by widget

What do I have to set as target at
the BindEvent ED Send Colour?


My widget is placed in an actor, maybe
it has to do something with that?

So an actor has a widget component that owns the widget that changes colours. Got it. As above then:

ColourBP → Get Widget Component →
Get User Widget → Cast To (widget
class) - that’s the widget.