.fondo_principal{
  display: table;
  position: relative;
  background-image: url(../imagenes/fondocontenedor.png);
  background-size: cover;
  padding: 150px 0;
  color: #FFF;
  width: 100%;
  height: 100vh;
}

.fondo_principal .container {
  color: #FFF;
}

a {
  color: white;
}