#background::before {background:#000;}
#background > div.bloc-timeline > div.icon-timeline {border-color:#000;color:#000;}
#background > div.bloc-timeline > div.icon-timeline > div > i {color:black;}
#background > div.bloc-timeline > div.content-timeline {background:#000;}
#background > div.bloc-timeline > div.content-timeline::before {border-left-color:#000;}
#background > div.bloc-timeline:nth-child(2n) > div.content-timeline::before {border-right-color:#000;}