use Term::ANSIColor ':constants';

# Note that there is not normally a space betweeh the </ and code>. I added that so that Perlmonks.org wouldn't parse the post incorrectly.
$_ = "normal <code> green <!-- yellow [red] normal --> normal </ code> normal";
$GREEN = GREEN;
$YELLOW = YELLOW;
$RED = RED;
$RESET = RESET;
s(<code>(.+?)</ code>)($GREEN$1$RESET)g;
s((?<=\x1b)\[(.+?)\])($RED$1$RESET)g;
s((<!--.+?-->))($YELLOW$1$RESET)g;