body {background-color:RGB(192,192,192);
}
.container-header{
  background-image: none;
  background-color:rgb(192,192,192);
}
div.card-body{
  background-image: none;
  background-color:rgb(192,192,192);
}
h3.card-header{
  background-image: none;
  background-color:rgb(192,192,192);
}
.container-footer{
  background-image: none;
  background-color:rgb(192,192,192);
}