Change the color of a Three.js globe

There is a really cool Three.js demo which has a 3D Globe: http://ift.tt/1nOqFuC

I'd like to change the color of the globe itself from black to navy blue. I'm looking through all the source files and keep changing things but nothing is having an effect on the globe color.

I don't know Three.js or WebGL that well. Might someone help?