.jumbotron {
    background: none !important;
    background-color: #EE1C25 !important;
}

.col-affiche {
    /*background-image: url(https://sports-events.org/conf_img/banniere/5-appli-banniere-banniere_nfl_nice.jpg) !important;*/
    background-image: url(https://www.sports-events.org/conf_img/banniere/6-banniere.jpg) !important;
    height: 200px;
    background-size: cover;
    background-position: center;
}