Hello, Dear Jose Ricardo Gress!

To perform your request, please click WP Dashboard => Appearance => Customize => Additional CSS and paste this code here:

.service_item {
     background-color: #e43d4e !important;
}
.highlight {
    color: #edfff0 !important;
    border-color: #3de4dc !important;
}
.ds .service_item .excerpt > * {
    color: #e6e7ec;
}

Then save changes and you will receive this result: http://prntscr.com/lfwdia

Best Regards!