.nav_button {
    color: white;
    width: 153px;
    height: 19px;
    margin: 0;
    font-size: 13px;
    font-weight: bold;
    font-family: Arial;
    display: block;
    background-color: 4000d0;
    border: 2px black solid;
    text-decoration: none;
    padding: 2px 0px 0px 8px;
   }

.nav_button_active a:hover,
.nav_button a:hover {
    color: red;
    background-color: deepskyblue;
}

.nav_button a:visited{
    color: white;
}

 .nav_button_active {
    color: white;
    width: 153px;
    height: 19px;
    margin: 0;
    font-size: 13px;
    font-weight: bold;
    font-family: Arial;
    display: block;
    background-color: c00040;
    border: 2px black solid;
    text-decoration: none;
    padding: 2px 0px 0px 8px;
}