.panel_header
{
 background:#3C8DBC !important; 
 -webkit-transition: background 0.1s ease-in-out;
 transition: background 0.1s ease-in-out;
 border: none !important;
 border-radius: 0px !important;
}
.panel_header:hover
{
 background:#367FA9 !important;
 -webkit-transition: background 0.1s ease-in-out;
 transition: background 0.1s ease-in-out;
 border: none !important;
 border-radius: 0px !important;
}