http://img6.imageshack.us/img6/9886/hattemplate.png (Unsupported image host)
This is my take of the hat. all credit goes to you however.
It may not be the best or good hat at all but i tried to show you an example of blending colors. The outlines matches the coloring and they both have similar shades. I see most hats having in blended shading and colors so i decided to try help you by shading your hat like this.