#testi_block,#blog_block{
    width: 17%;
    float: left;
    height: 92px;
    color: #ffffff;
    position: relative;
}
#avis_block,#blog_block{
    width: 17%;
    float: left;
    height: 92px;
    color: #ffffff;
    position: relative;
}

#testi_block h4,#blog_block h4, #avis_block h4{
    margin: 0;
    position: absolute;
    top: 50%;
    -ms-transform: translateY(-50%);
    transform: translateY(-50%);
    display: block;
    width: 100%;
    text-align: center;
}
#blog_block{
    background: #3291c0;
}
#testi_block{
    background: #275C86;
}
#avis_block {
  background: #2b7ea7;
}
#blog_block img{
    padding-right: 10px;
}
@media (max-width: 991px) {
    #testi_block,#blog_block,#avis_block {
        width: 100%;
    }
}