CodePen

HTML

            
              <h1><span>Hello</span> World</h1>
            
          
!

CSS

            
              h1 {
  background-color: black;
  color: white;
  display: inline-block;
  position: relative;
  height: 40px;
  span {
    color: orange;
  }
  &:after {
      content: "";
      position: absolute;
      border: 20px solid black;
      border-right-color: transparent;
      border-bottom-color: transparent;
    }
}
            
          
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JS

            
              
            
          
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