Use a CSS Class to Style an Element. i need help on this topic have been stuck

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Your code so far

  .blue-text{colour:blue;}
  
   
  
</style>

<h2>CatPhotoApp</h2>

<p>Kitty ipsum dolor sit amet, shed everywhere shed everywhere stretching attack your ankles chase the red dot, hairball run catnip eat the grass sniff.</p>

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Your Browser User Agent is: Mozilla/5.0 (Windows NT 6.1; rv:45.0) Gecko/20100101 Firefox/45.0.

Link to the challenge:
https://www.freecodecamp.org/challenges/use-a-css-class-to-style-an-element

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