Manual installation:
git clone git://github.com/oblique/pygments-style-behelit.git
cd pygments-style-behelit
python setup.py install
>>> from pygments.formatters import HtmlFormatter
>>> HtmlFormatter(style='behelit').style
<class 'pygments_style_behelit.BehelitStyle'>
pygmentize -S behelit -f html > behelit.css
Please read the official documentation for further information on the usage of pygment styles.