I got a young rubber tree plant a month or so ago, and it has already grown a new leaf. I noticed the leaf is green instead of the normal reddish color, but I thought that might be normal for new leaves. I did some research, and it seems that this happens when the plant is not getting enough sun. I had it in a north facing window with the blinds closed. How can I get the plant more light and will the new leaf ever turn the normal burgundy color?

Take it to a brighter window and put it closer to the light. A north window is not enough light. The colors will be ok in the right lighting. A little morning sun won't hurt you rubber tree, mine gets a few hours of morning sun everyday.

New leaves darken as they mature. If you uncover the north window by opening the blinds, that would provide almost ideal light for your Rubber Plant.

Thanks for the advice! I now have it in a west facing window that is shaded by a tree outside. The colors haven't changed yet, but it might in time!