Hypertext Markup Language (HTML)

Cascading Style Sheets (CSS): a language that describes the style of how HTML elements are displayed

htmlandcss.html

<!-- CSS is contained in <style> tags,
or can be put into a separate file: -->

<style>
p {
  background-color: deeppink;
  font-size: 24px;
}
</style>

<p>This paragraph element has changed from its regular display.</p>

<p>So has this one too.</p>