If you add this to the end of your autoexec.bat or run from the command line:
prompt $E[35m$P$G$E[m
You get a colored prompt. You can change the color with switch.x by changing the P1 color. The P3 color changes the rest of your text.
(http://i.imgur.com/iL6Wis.png) (http://imgur.com/iL6Wi)