A CodePen by Ludvig Lindblom.

index.html

<div class="wrapper">
  <div class="box one">
    <p>Hello World!</p>
  </div>
  <div class="box two">
    <p>Hello World!</p>
  </div>
  <div class="box one">
    <p>Hello World!</p>
  </div>
</div>

style.css

.wrapper {
  width: 600px;
  margin: 50px auto;
  padding: 10px;
  background: #eaeaea;
  letter-spacing: -0.31em;
  *letter-spacing: normal;
  word-spacing: -0.43em;
}
.box {
  box-sizing: border-box;
  margin: 0;
  padding: 10px;
  display: inline-block;
  background: #f9f9f9;
  zoom: 1; *display: inline;
  letter-spacing: normal;
  word-spacing: normal;
  vertical-align: top;
}
.one {
  width: 25%;
}
.two {
  width: 50%;
  background: #ffffff;
}
p {
  margin: 0;
  padding: 0;
}