.container_blue .panel-default {
    background: linear-gradient(to bottom, #19bbda , #76d7e5);
    border: none;
}
.container_blue .panel-heading {
    background-color: #19bbda;
}
.container_blue .panel-heading h1 {
    margin: 0;
    font-size: 16px;
    color: #fff;
    text-transform: uppercase;
    font-weight: 700;
}