Visor color

In Halo: Reach, in addition to customizing armor, you are allowed to customize the color of your visor from the traditional yellow gold to a variety of colors. As of now there are 5 colors available to choose from. These are purely cosmetic and have no effect on gameplay whatsoever. The colors available are Default, Silver, Blue, Black, and Gold. There is a Red colored visior, but it's unknown how to get it.