.grey {
    background: #F5F5F5;
    color: inherit;
}

#top_grid {
   text-align: center;
}

#top_grid div {
    display: inline-block;
    width: 150px; 
   font-size: 17px;
}

.content h2 {
    text-align: center;
}

.grey h4 {
    color: #0e0e0e;
}