Try this CSS to customize the service block colour and hover states.

Main colour

.circle-lrg-icon i, .circle-lrg-icon span {
    background-color: #7df191;
    border-color: #7df191;
}

hover state

.circle-lrg-icon i:hover, .circle-lrg-icon span:hover{
color:#7df191;border-color:#7df191;background-color: rgba(255,255,255, 0);
}