.jumbotron{
background-color : white;
}



  input[type='checkbox'] { -webkit-appearance:none; 
                           width:30px; height:30px; 
                           background:white; 
                           border-radius:5px; 
                           border:2px solid #555; } 
  
  input[type='checkbox']:checked { background-color: deepskyblue }