JSFiddle - React, Tailwind, and code Playground

HTML

<div class="first"></div>
<div class="second"></div>

CSS

body {
  background-color: #3d1010;
}
.first {
  width: 234px;
  height: 100px;
  margin-bottom: 10px;
    position: relative;
}

.first:after{
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  border-top:1px dashed #FFFFFF;
  height: 1px;
}

.second {
  width: 234px;
  height: 100px;
  border-top: 1px dashed #ffffff;
}