CodePen

HTML

            
              <!DOCTYPE html>
<html>
  <head>
    
  </head>
  <body>
    <header>
      <div class="container">
        <p>This is some content</p>
      </div>
  </body>
</html>
            
          
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CSS

            
              body {
  background-color: blue;
}

header {
  height: 180px;
  background-color: yellow;
  /* outline: 1px solid red; */
}

.container {
  height: inherit;
  width: 1800px;
  margin: 0 auto;
  background-color: red;
  /* outline: 1px solid blue; */
}
            
          
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JS

            
              
            
          
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