.justified-gallery > .jg-entry-visible.action-toggle-photo{
    background-color: #00f; 
}

.action-toggle-photo div{
    position: absolute;
    padding-left: 5px;
    padding-right: 5px;
    width: calc(100% - 10px);
    top: 50%;
    transform: translate(0%, -50%);
    text-align: center;
    color: #fff;
    
    white-space: nowrap;
    font-size: 12px;
    
}