How do I create a Chatter Post that looks like this?

What I want to do is, have a trigger that calls a function to create a chatter post when a new contact is created. I want it to look like the image below. Right now, I have a trigger on 'Contact' that calls a function, but I'm not sure of how to create a Chatter FeedItem that looks like this.

Sample Chatter Post

Is there a certain FeedItem Type that will do this?
Or is there a way for me to add style to the FeedItem?