Use these Script:
Code:
 
on *:OP:#: set %cchan $chan | nickcolour
on *:DEOP:#: set %cchan $chan | nickcolour
on *:VOICE:#:  set %cchan $chan | nickcolour
on *:DEVOICE:#: set %cchan $chan | nickcolour
on *:HELP:#: set %cchan $chan | nickcolour
on *:DEHELP:#: set %cchan $chan | nickcolour
alias nickcolour {
  set %y 1
  goto colouring
  :colouring
  if ($nick(%cchan,%y) isop %cchan) cline %op %cchan $nick(%cchan,%y)
  if (($nick(%cchan,%y) ishop %cchan) && ($nick(%cchan,%y) !isop %cchan)) cline %ho %cchan $nick(%cchan,%y)
  if (($nick(%cchan,%y) isvoice %cchan) && ($nick(%cchan,%y) !isop %cchan) && ($nick(%cchan,%y) !ishop %cchan)) cline %vo %cchan $nick(%cchan,%y)
  if ($nick(%cchan,%y) isreg %cchan) cline %no %cchan $nick(%cchan,%y)
  inc %y
  if ($nick(%cchan,0) < %y) halt
  goto colouring
}

Set the Colour with
/set %op +Colour =OP
/set %ho +Colour =Halfop
/set %vo +Colour =Voice
/set %no +colour =Normal
Dont forget to make a new scripting file

Crash