Photoshop brush settings… HELP!!!?

I want to follow this tutorial I found on how to color hair with Photoshop.

The thing is, I can’t seem to figure out how to get the brush settings like the ones they are showings. I’ve seen this brush being used COUNTLESS times, but no one takes the time to explain how to get them.

This pic here explains it all…

On the right is the closest I can get to this, after tinkering with the brush settings for a bit. I still can’t get it to look exactly like the one the tutorial shows. Am I missing something?