For information about tooltips and dropdowns please refer to Bootstrap's documentation.
Using custom CSS classes you can customize your tooltips:
js
$('#tooltip-1').tooltip({
template:
`<div class="tooltip" role="tooltip">
<div class="arrow brc-success"></div>
<div class="bgc-success tooltip-inner text-dark-tp3 font-bolder text-110 px-2 pb-2"></div>
</div>`
});
$('#popover-1').popover({
container: 'body',
template:
`<div class="popover brc-success-m3" role="tooltip">
<div class="arrow brc-success"></div>
<h3 class="popover-header border-0 bgc-success-m2 text-dark-tp4 text-600"></h3>
<div class="popover-body text-grey-d2"></div>
</div>`
});
For popovers you can have a .arrow2.arrow that comes before .arrow .
.arrow2 should have a color similar to .popover-header's background and .arrow should have a color similar to .popover's border color:

js
$('#popover-2').popover({
container: 'body',
template:
`<div class="popover brc-primary-m2 border-b-2" role="tooltip">
<div class="arrow arrow2 brc-primary-l2"></div>
<div class="arrow brc-primary"></div>
<h3 class="popover-header bgc-primary-l2 border-0 text-110 text-dark-tp4 text-600"></h3>
<div class="popover-body text-grey-d2"></div>
</div>`
});