hr vertical centered in a div

Question

How to center a HR tag vertically in a div, i tried this but its not centered perfectly

.container {
    position: relative;
    width: 80vw;
    height: 40vh;
    border: solid 4px #333;
}

hr {
    height: 5px;
    background-color: cadetblue;
    position: absolute;
    right: 0;
    top: 50%;
    left: 0;
    transform: translateY(-100%);
}

<div class="container">
  <hr>
</div>

Answer 1

Change transform to translateY(-50%); and add margin: 0; to the hr:

(BTW: No need for top and bottom settings if you have a defined height, having one of those is sufficient)

.container {
    position: relative;
    width: 80vw;
    height: 40vh;
    border: solid 4px #333;
}

hr {
    height: 5px;
    background-color: cadetblue;
    position: absolute;
    right: 0;
    top: 50%;
    left: 0;
    transform: translateY(-50%);
    margin: 0;
}

<div class="container">
  <hr>
</div>