Yup, thats how brushes are made :]
There are much more intricate ways to edit and make them look amazing.
Like changing shadows, and adding gradients to give more detail. But that's kinda self explanatory.
( with no colors becouse someone disable my ability to ad colors )
Why would you want a colored brush?
a brush is a brush.....its not the "paint"
the user adds color schemes when they use them :]