Added support for Essentials-style formatting and color codes in the border crossing message, which are based on standard Minecraft text formatting codes (ex. §c for red) but with the more accessible "&" ampersand in place of the "§" (ex. "&c" for red). The default red coloration is now included in the border message itself as "&c" at the start of it. Existing configurations will have their border messages automatically updated to add it.

Reference, standard Minecraft codes (note again that you can replace "§" with "&" for ease of use):
http://minecraft.gamepedia.com/Formatting_codes