Dynamic change of colors from a given list.

I am trying to change the color of the chair (or any object) dynamically form a given predefined sets of colors. I am taking help from this tutorial-

Can any one tell me how can I make set of colors example set of 4 colors from which i can toggle the color of the chair. In the tutorial it is selecting random colors.
I am new to Unreal.

You can create a array of colors and call them using an integer variable that iterates.