hello

 welcome to the forums, to make your name with a background colour try using this:
type /nick in a conversation window> hold ctrl and hit k and add > , < a comma

  and the choose your colour from the box. (it'll stay there as you press the comma too) then choose the number of colour( anumber will appear thats why...) and then type your nick name out and press enter and there, you have a pretty lookin' nick 

 and you can also ad colour letters again too
 
/nick (ctrl k),(numbercolour) nickname
Edit: thanks matty. but i dont see ctrl+ anywhere 
 
 
 wow confusion.