@staticmethod
def _set_btn_color(btn, color):
    """Set the button with giving color.
        """
    btn.setStyleSheet(
        """QPushButton {
  margin: 1px;
  border-color: rgb(0, 85, 0);
  border-style: outset;
  border-radius: 3px;
  border-width: 1px;
  color: black;
  background-color: %s;
"""
         % color.name() +
        """}
QPushButton:pressed {
  background-color: white;
}""")
