Or if you wanted to use IRC code, you could use the following
code:
·& = italic
·$?,~ = coloured('?' being text colour, and '~' being background colour.
To get the colour code, just poush ctrl and R in a conversation and then just copy and paste the number where ever you want it(either as text colour or background colour)
·# = bold
·@= underline
In IRC you don't have to end anything like [/b] so, i find it easy to use.