meshviewer/scss/_legend.scss

.legend .symbol {
  width: 1em;
  height: 1em;
  border-radius: 50%;
  display: inline-block;
  vertical-align: -5%;
}

.legend-new .symbol {
  background-color: #93E929;
}

.legend-online .symbol {
  background-color: #1566A9;
}

.legend-offline .symbol {
  background-color: #D43E2A;
}

.legend-online, .legend-offline {
  margin-left: 1em;
}