<div class="conatiner">
  <div class="row">
    <div class="box"></div>
  </div>
</div>

body {
  background-color: #222;
}

.container {
  background-color: #84ac82;
}

.box {
  background-image: linear-gradient(-90deg, #eee, #FFF);
  width: 100%;
  height: 100px;
}