Heh, I initially thought about using 99 (btw, it is not the "normal text colour", it's the transparent colour; it makes a difference) but dismissed it because of this:
//var %x = ab,123,xy | !.echo -q $regsub(%x,/^(.)(.)(.*)(.)(.)$/g,\104\299\304\499\5,%x) | echo -s %x
