Override Styles in Subsequent CSS

Summary

Classes will override the body element’s CSS.
The second declaration will always take precedence over the first.

Final Code

<style>
  body {
    background-color: black;
    font-family: monospace;
    color: green;
  }
  .pink-text {
    color: pink;
  }
  .blue-text {
    color: blue
  }
</style>
<h1 class="pink-text blue-text">Hello World!</h1>