mempool/frontend/src/app/components/hashrate-chart/hashrate-chart.component.scss

.main-title {
  position: relative;
  color: #ffffff91;
  margin-top: -13px;
  font-size: 10px;
  text-transform: uppercase;
  font-weight: 500;
  text-align: center;
  padding-bottom: 3px;
}