title: Change color of matInput
body: <p>How do I change matInput to a custom color. I want to change the placeholder and underline color.</p>
  
  <p>I have read through most of the posts and could not find a solution to change the underline.</p>
  
  <pre><code>  &lt;mat-form-field class="example-full-width"&gt;
      &lt;input matInput placeholder="Favorite food" value="Sushi"&gt;
    &lt;/mat-form-field&gt;
  </code></pre>
  
  <p><a href="https://stackblitz.com/angular/yglxbxybndq/" rel="noreferrer">Stackblitz example</a></p>
  
  <p><a href="https://i.stack.imgur.com/ln3UE.jpg" rel="noreferrer">Image example</a></p>