Background silver Color to a Div Element

I stucked here and I am not able to fit it properly. please help

<div class="silver-background">
  <p>Things cats love:</p>
  <ul>
    <li>cat nip</li>
    <li>laser pointers</li>
    <li>lasagna</li>
  </ul>
  <p>Top 3 things cats hate:</p>
  <ol>
    <li>flea treatment</li>
    <li>thunder</li>
    <li>other cats</li>
  </ol> 
</div>

you could do…

<div class="silver-background"
     style="background: silver">

or…

<style>
  .silver-background
  {background: silver;    
  }
</style>

Thanks for help. It is really appreciated