consul/ui/packages/consul-ui/app/components/topology-metrics/popover/index.scss

.topology-metrics-popover {
  > button {
    position: absolute;
    transform: translate(-50%,-50%);
    background-color: $white;
    padding: 1px 1px;
    &:hover {
      cursor:pointer;
    }
    &:active, &:focus {
      outline: none;
    }
  }
  &.deny .informed-action header::before {
    display: none;
  }
  &.deny > button::before,
  &.deny .tippy-arrow::after {
    @extend %with-cancel-square-fill-color-mask, %as-pseudo;
    background-color: $red-500;
  }
  &.l7 > button::before,
  &.l7 .tippy-arrow::after {
    @extend %with-layers-mask, %as-pseudo;
    background-color: $gray-300;
  }
}