title: IE and mgt-login not coperating
body: <p>Question: why does my color change not work in IE(11) on the mgt-login
  <a href="https://i.stack.imgur.com/LsJr9.png" rel="nofollow noreferrer">enter image description here</a></p>
  
  <pre><code>mgt-login {
      --color: #fff;
  }
  &lt;mgt-login&gt;&lt;/mgt-login&gt;
  
  </code></pre>
  
  <p>Any ideas? It works fine in other browsers</p>
  
  <p>Edit: It's all components i cant change css on.</p>