curver/functions/kirki/kirki-packages/control-dimension/src/control.scss

.customize-control-kirki-dimension {
  .has-label-bottom {
    .kirki-control-label {
      margin-top: 3px;
      text-align: center;
      font-size: 11px;
      color: #333;
      font-weight: 500;
    }

    .kirki-control-input {
      background-color: #f7f7f7;

      &:focus {
        background-color: #fff;
      }
    }
  }
}