Below is the file 'contrib/color-logs.conf' from this revision. You can also download the file.
#
# this is a colorization config for reading the output of "monotone log"
# or "monotone diff", or best of all "monotone log --no-merges --diffs".
#
# use with the "colorize" script in this dir, or color-logs.sh
#
/^\#/ bold red
/^\-{30}/ bold red
/^\w[\w\s]+:/ bold red
/^(\-{3}|\+{3})/ black on_cyan
/^\-/ dark magenta
/^\+/ dark cyan
/^\@/ dark yellow