Board Thread:Questions and Answers/@comment-5885468-20130107220309/@comment-71.34.73.33-20130127035907

It is actually only for visual appearance in the GUI (i think, but it doesn't change the power, range or anything beyond the color). You can put a Lumar of any color in it to "color code" a custom frequency in the GUI, at the cost of using up that Lumar.