At first I tried that, but just like with the Particle System, I belong to those unlucky ones for whom TTFs just won't work, they're very buggy for me, so I am afraid won't use them. (I prefer making my own Font(s) anyway for this Game, and I am more comfortable with Pixels.)
However, I recently stumbled upon a Post (from you, if I am not mistaken), explaining that even a Bitmap Font can be set as TTF to change its Color, which I tried and that works perfectly for me, so thanks for that by the Way. : )