CodePen Embed - CSS colors

<h1>Heading 1</h1>
<h2>Heading 2</h2>
<h3>Heading 3</h3>

h1 {
  color: rgba(255,0,0,1);
}
h2 {
  color: rgba(255,0,0,.6);
}
h3 {
  color: rgba(255,0,0,.1);
}

This Pen is owned by Nicholas Coughlin on CodePen.

This Pen doesn't use any external CSS resources.

This Pen doesn't use any external JavaScript resources.