consul/ui/packages/consul-ui/app/components/tooltip-panel/skin.scss

%tooltip-panel dt {
  cursor: pointer;
}
/* This is the top chevron */
%tooltip-panel dd > div::before {
  @extend %as-pseudo;
  width: 12px;
  height: 12px;
  background: white;
  border-top: 1px solid $gray-300;
  border-right: 1px solid $gray-300;
  transform: rotate(-45deg);
  position: absolute;
  left: 16px;
  top: -7px;
}