Help with the color change of a game object

Hello. The question I have is about making a temporary color change to an object. I made a honeycomb graphic in Blender and in unity I need that object to change from it's original coloring to black and stay black again until it's clicked.

I have looked online for an answer and I found ways to change it permanently but that's not really what I'm looking for.

If you can cite documentation or anything else that can help me to find the correct answer I would greatly appreciate it.