Coloring the tip of a tail different.

Hello,
I have a quick question about coloring a tail tip with a different color.
Tail is made with hair of course and rendered in cycles.
I really can’t think of a way myself being new to actually using hair in Blender, googling only brings up answers about coloring the tip of hair strands.

For reference, this is what I want to get:

And my tail if that is needed:

Do not take that hair material seriously however texture (or vertex paint as in example) of the tail itself can influence hair color.
http://www.pasteall.org/blend/36244

Very nice, exactly what I needed!
Thank you very much.