Make this simbol "§" (made with alt-21 on Windows) on notepad or something then copy and Paste that "§" when making a world name then the next number/type will change the color of the text. Colors i have found:
§1 = Blue
§2 = Dark Green
§3 = Light Blue
§4 = Dark Red
§5 = Dark Purple
§6 = Yellow-orangish
§7 = Grey
§8 = Dark Grey
§9 = Light Purple?
§0 = Black
§e = Yellow
§a = Green
§d = Purple
§k = Random Letters
§c = Light Red
§b = Cyan