title: How to change style in MenuItem from PrimeNG
body: <p>I'm trying to change the color of a MenuItem, using PrimeNG here.
  Here's my code so far:</p>
  
  <pre><code>&lt;p-menu [style]="{'width': '400px'}" #menuOpcoesLista popup="popup" [model]="opcoesListaCS" appendTo="body"&gt;&lt;/p-menu&gt;
  </code></pre>
  
  <p>And here's my function to create the itens from menu:</p>
  
  <pre><code>     this.opcoesListaCS = [
          {label: 'Approve', command: (event) =&gt; { this.approve() }},
          {label: 'Send email', command: (event) =&gt; { this.sendMail() }},
          {label: 'Details', command: (event) =&gt; { this.details() }}];
  </code></pre>
  
  <p>I tried to add style tag, according to PrimeNG docs, but it just doesn´t work. Tried all formats and kinds, tried also class. But non worked for me.</p>
  
  <p>Does anyone know how to change the color? I'd like the first one to be green, second as yellow and third as red.</p>