JSFiddle - React, Tailwind, and code Playground

HTML

<div class="bit-3">
  <div class="event" style="background-image: url(https://container25.at/wpdev/wp-content/uploads/2016/06/test.jpg)">
    <div class="inner-text">
      <div>
        Text inner asdf
      </div>
      <div>
        Text inner asdf
      </div>
    </div>
  </div>
</div>
<div class="bit-3">
  <div class="event" style="background-image: url(https://container25.at/wpdev/wp-content/uploads/2016/06/20170715_mareados.jpg)">
    <div class="inner-text">
      <div>
        Text inner asdf
      </div>
      <div>
        Text inner asdf
      </div>
    </div>
  </div>

</div>

CSS

.bit-3 {
  width: 33.33333%;
  float: left;
  margin-left: 20px;
}

.event {
  margin: 0 auto;
  position: relative;
  border: 2px solid #000000;
  padding-bottom: 141%;
  background-size: cover;
}

.inner-text {
  position: absolute;
  width: 100%;
  height: 100%;
  text-align: center;
  z-index: 1;
  -webkit-transition: background 1000ms;
  transition: background 1000ms;
  background: rgba(255, 255, 255, 0.5)
}

.event:hover .inner-text {
  background: rgba(255, 255, 255, 0)
}