I wanna to change the background-color title on hover and not when is not hover. The problem is when I hover the element the title remains with light grey color(I think is default value color). I want to change the background in black color
<a class="popover-title" data-toggle="tooltip" data-trigger="hover"
                    title="test" 
             popover-append-to-body="true">
with this style
 .myStyle{
    max-width: 200px;
    padding: 0.25rem 0.5rem;
    color: #fff;
    text-align: center;
    background-color: black;
    border-radius: 0.25rem;
  }
SOLVED
I found a solution
[data-title]:hover:after {
  opacity: 1;
  transition: all 0.1s ease 0.5s;
  visibility: visible;
}
[data-title]:after {
 content: attr(data-title);
 max-width: 200px;
 background-color: #000;
 color: #fff;
 position: absolute;
 text-align: center;
 padding:  0.25rem 0.5rem;
 border-radius: 0.25rem;
 font-style: normal;
 font-weight: 400;
 line-height: 1.5;
 z-index: 99999;
 visibility: hidden;
}
[data-title] {
  position: relative;
}
But the problem is when I want to put the translate it doesnt work and the tooltip returns transparant
<a class="font-weight-bold font-xs btn-block text-muted" data-toggle="tooltip" data-placement="bottom"
                [attr.data-title]="'test' | translate" 
          popover-append-to-body="true">

