Namecolor allows you to color the text of your display name, as opposed to coloring around your display name with the NameGlow power.
The Namecolor code goes inside your display name, and the format is as follows: (glow#NameGlowCode#NameColorCode)
You are able to color just the text of your name, and have no glow on it. To do this, put a 0 in for the NameGlow code. Here's an example: (glow#0#R) will make your name red without a glow.
Here are a few examples:
You can also click here for a Namecolor code generator.