How to trigger two hovers when hovering over single element CSS

.overlay-text {
  background-color: #79b13c;
  color: white;
  z-index: 50;
  position: absolute;
  bottom: 0px;
  width: 270px;
  text-align: center;
  font-size: 1.4rem;
  font-weight: 600;
  -webkit-transition: background-color 0.5s ease-in-out, font-size 0.5s;
  -moz-transition: background-color 0.5s ease-in-out, font-size 0.5s;
  -o-transition: background-color 0.5s ease-in-out, font-size 0.5s;
  transition: background-color 0.5s ease-in-out, font-size 0.5s;
}

.overlay-text:hover {
  content: "";
  background-color: #328ba6;
  cursor: pointer;
  transition: ease-in-out 0.5s, font-size 0.5s;
  line-height: 2;
  font-size: 1.5rem;
}

.overlay-text:hover::after {
  transition: ease-in-out 1s, font-size 1s;
}

.col-md-3 {
  -moz-box-sizing: border-box;
  -webkit-box-sizing: border-box;
  box-sizing: border-box;
  overflow: hidden;
  position: relative;
  padding-left: 5px;
  padding-right: 5px;
}

.col-md-3 img {
  -moz-transition: all 0.3s;
  -webkit-transition: all 0.3s;
  transition: all 0.3s;
}

.col-md-3 img:hover {
  -webkit-transform: translate3d(0, -10%, 0);
  transform: translate3d(0, -10%, 0);
  cursor: pointer;
}

.overlay-text-blank {
  text-align: center;
  font-size: 1.8rem;
  font-weight: 600;
  vertical-align: middle;
}

<div class="container">
  <div class="row tiles">
    <div class="col-md-3">
      <img alt="text" src="https://www.codeproject.com/KB/GDI-plus/ImageProcessing2/img.jpg" class="img-fluid">
      <div class="overlay-text">Custom text</div>
    </div>
  </div>
</div>