[Seven Skins]

You can add the code below to additional.css template and change the colors accordingly.

.pollresults-data tr td.pollvoter-cell .voter-icon .voters {
    border: 1px solid #2379B5;
    background: #F00;
}

.pollresults-data tr td.pollvoter-cell .voter-icon .voters .note {
    color: #2379B5;
}