If a person uses more then an x amount of colors, u will kick them, when your an op on the channel ofcourse.
Explantion:
"if ($regex($1-,/\003/g) > 3)" Determens how much is allowed, the more your increase the number after the ">" the more colors people can use.
"(Max 3)" seems logic. It says how much colors are allowed in the kick.

on *:TEXT:*:#channelweretouseit:{
  if ($regex($1-,/\003/g) > 3) { kick $chan $nick EXCESSIVE-COLORS. $regex($1-,/\003/g) colors detected. (Max 3) }
}