Win32 console does not support ANSI escape sequences
The terminal formatter uses ANSI escape sequences for colour. These do not work in the Win32 console.
This can be addressed by using the "colorama" package from PyPI - either by bundling or as an optional dependency.
All that is needed is
if sys.platform.startswith('win'): try: from colorama import init() init() except ImportError: pass
at the start of formatters/terminal.py.
I'll put together a pull request for this, if there is interest.