Set color scheme of the console (foreground and background).

def set_color_scheme(self, foreground_color, background_color):
        """Set color scheme of the console (foreground and background)."""
        self.ansi_handler.set_color_scheme(foreground_color, background_color)

        background_color = QColor(background_color)
        foreground_color = QColor(foreground_color)

        self.set_palette(background=background_color,
                         foreground=foreground_color)

        self.set_pythonshell_font()