Event trigger detection

So its hard to explain but...

I am trying to make some kind of dynamic UI instantiated and customized by a C# script.

I have (deactivated, which gets activated later as more of them instantiates) prefab UI panel with some text in it, and script then instantiates more of those and they all have same event triggers. So basically what I am trying to do is, whichever gets pointer enter event, color it (kinda highlight it with color) orange, and problem is, I am not sure how to detect it to...

Event trigger detection