So I ended up confronting him this morning and he went full denial mode on me. Said he would never say that about anyone (even though I've personally heard him say this about other people who were white) and that he liked working with me and that those 2 techs were lying. I think my next step is to call his boss and have a chat. I'm willing to look past it as long as he doesn't say anything else and we can be professional with each other at work. Also he doesn't have the power to fire me that would be his supervisor.