Question with gradient colors using plot3: connecting lines

Hello,

I was wondering if I can associate a colormap with a binary tree I create using plot3 to connect lines. In my program, I create a binary tree by an offshoot CCO method, and I would like to make colormaps based off things I calculate (like radii or flow).

I was wondering, how would I go about doing this? I've used colormap before with meshgrids, but not with plot3. If I can create a color gradient, that would be preferred for visualization.

Here are a series of pictures of binary trees I create. In these, I was wondering how I can set color due to radii.

http://imgur.com/IeSHLyB,tWe5CA2,rZotssS

Thanks!