#ex3::-webkit-scrollbar{
width:16px;
background-color:#1a2f30;
} 

#ex3::-webkit-scrollbar-thumb{
background-color:#247371;
border-radius:10px;
}

#ex3::-webkit-scrollbar-thumb:hover{
background-color:#247371;
border:1px solid #333333;
}

#ex3::-webkit-scrollbar-thumb:active{
background-color:#247371;
border:1px solid #333333;
} 


#ex3
{scrollbar-base-color: #247371;
  scrollbar-arrow-color: #1a2f30;
  border-color: #333333;}