Stack traces are hard to read when the messages wrap, because it's hard to tell
when one message ends and the next message starts. Carp::Always::Color just
colors the first line of each stacktrace, based on whether it's a warning or an
error. If messages are being sent to a terminal, it colors them with terminal
escape codes, otherwise it colors them with HTML (ideas for more intelligent
behavior here are welcome).

WWW: http://search.cpan.org/dist/Carp-Always-Color/