title: Changing tab text color on selection
body: <p>I am working on Angular4 and have been using angular material.  I have created a tab-group and I want to change the text color of a tab label when I select any tab. I have tried to override the default css but that didn't help me.</p>
  
  <p>I can override the ink bar but I am not able to override tab-text color upon selection</p>
  
  <pre><code>.mat-ink-bar{
      background-color:#00ADEE;
  }
   /*.mat-tab-label::selection{
   color: #00ADEE !important;
   } */
  </code></pre>
  
  <p>The commented part which I was trying to change the color of a tab-label-color.</p>