Vaadin Upload Button, CSS to change its color (same styles as Button)?
<p>Vaadin 7.6.2</p>

<p>What would be the <strong>CSS</strong> that would allow me to change the upload button's color to one of the following: <strong>danger</strong>, <strong>primary</strong> or <strong>friendly</strong> so that I may use <code>setStyleName()</code> in the same way as I do for a Button ?</p>

<p>Ref:
<a href="https://vaadin.com/docs/-/part/framework/components/components-button.html" rel="nofollow">https://vaadin.com/docs/-/part/framework/components/components-button.html</a></p>

<p>This Doc doesn't discuss the bug or fix:
<a href="https://vaadin.com/docs/-/part/framework/components/components-upload.html" rel="nofollow">https://vaadin.com/docs/-/part/framework/components/components-upload.html</a></p>

<p>But does say:</p>

<blockquote>
  <p>The upload button has the same structure and style as a regular Button component.</p>
</blockquote>

<p>So, I guess that the SCSS or CSS that isn't included for this "button" is either an omission, oversight, or bug.</p>