Change the colours in The One Pager timeline

timeline.css

/* Change timeline post background colours to #f0f0f0 and #eeeeee on hover */
#posts-timeline .timeline-post {background: #f0f0f0;}
#posts-timeline .timeline-post:nth-child(1n):before {border-color: #f0f0f0 transparent transparent transparent;}
#posts-timeline .timeline-post:hover {background: #eeeeee;}
#posts-timeline .timeline-post:nth-child(1n):hover:before {border-color: #eeeeee transparent transparent transparent;}

@media only screen and (min-width: 768px) {
        #posts-timeline .timeline-post:nth-child(2n):before {border-color: transparent transparent #f0f0f0 transparent;}
        #posts-timeline .timeline-post:nth-child(2n):hover:before {border-color: transparent transparent #eeeeee transparent;}
}

/* Change the 'dot' colours to #444 and #000 on hover */
#posts-timeline .timeline-post:nth-child(1n):after {background: #444;}
#posts-timeline .timeline-post:nth-child(1n):hover:after {background: #000;}

/* Change the timeline colour to #eee */
#posts-timeline:before {background: #eee;}

/* Change the hover glow to #333 */
#posts-timeline .timeline-post:hover {
  box-shadow: 0 0 10px 0 #333;
  -webkit-box-shadow: 0 0 10px 0 #333;
}