CodePen Embed - JjjJVd

<div class="gradient">
  
</div>

div {
  height: 100px;
  background-color: red;
  background-image:
    linear-gradient(
      to right,
      red,
      yellow 10%
    );
}

This Pen is owned by Chris Coyier on CodePen.

This Pen doesn't use any external CSS resources.