'Set color scheme of the shell.'

def set_color_scheme(self, color_scheme):

    self.set_bracket_matcher_color_scheme(color_scheme)
    (self.style_sheet, dark_color) = create_qss_style(color_scheme)
    self.syntax_style = color_scheme
    self._style_sheet_changed()
    self._syntax_style_changed()
    self.reset(clear=True)
    if (not dark_color):
        self.silent_execute('%colors    linux')
    else:
        self.silent_execute('%colors    lightbg')
