Can't get custom brushes and Illustrator brushes to merge
I created some custom brushes and I drew some lines. I am trying to merge those lines with some lines from the original illustrator brushes. I am pretty sure they won't merge because they are not the same color but no matter how hard I try, I cannot get them to be the same color. I have gone in and made sure they have the same color number(when I did that they did not look close to the same color and I did expand appearance)
This is making me really mad because I want to use both the original brushes and brushes I make in one drawing. Any ideas on how to fix this?

