hah, make mIRC more disability friendly :P yes, i suppose it looks neater when everything is one color, here's a small snippet you can use to accomplish this:
alias ezekiel {
var %i = 1
while ($window(*,%i).wid) {
window -g0 @ $+ $v1
inc %i
}
}
alias f2 scon -a ezekiel
then you can press f2 to clear the colors across all networks :P