Disconnect Relation of Duplicated Object: Adding Color to One Object Auto Adds the Sa

Please Help!

I Duplicated objects and now when I try to adjust the color, or texture to one object it automatically adjusts it’s sister’s color too. how do I disconnected that relation?

Thank you.

U / Make Single User

Or add the material to the Object and not the Object Data if you want the objects to be linked but use different materials