#navigation #menu-button {
  color: #ffffff;
}
  #navigation #menu-button:after {
  border-top: 2px solid #ffffff;
  border-bottom: 2px solid #ffffff;
} 
  #navigation #menu-button:before {
  background: #ffffff;
}
  #navigation #menu-button.menu-opened:after {
  background: #ffffff;
}
  #navigation #menu-button.menu-opened:before {
  background: #ffffff;
}
  #navigation .submenu-button:after {
  background: #ffffff;
}
  #navigation .submenu-button.submenu-opened:after {
    background: #ffffff;
}