Currently reek outputs some ANSI codes in it's output.  However, I don't think setting the default to be `--no-color` would be a breaking change for anything.  In metric_fu, I strip out ANSI characters from reek output.  Having them already absent breaks nothing for me.

I spend time in the terminal and like ANSI coding, but it's really only a nicety for visual inspection.  Plain text is a much better default IMHO.