Make Bootstrap Button Transparent
<p>How do I make my button transparent? I have been trying to use .btn-transparent but cant seem to get it to work. The button just keeps turning grey. </p>

<pre><code>&lt;p&gt;
    &lt;!-- Search Button --&gt;
    &lt;div class="container3"&gt;
        &lt;div class="btn-group "&gt;
            &lt;button type="button" class="btn btn-primary-outline"&gt;SEARCH&lt;/button&gt;
            &lt;button type="button" class="btn btn-primary-outline"&gt;
                &lt;span class="glyphicon glyphicon-menu-right"&gt;&lt;/span&gt;
            &lt;/button&gt;
        &lt;/div&gt;
    &lt;/div&gt;
&lt;/p&gt;
</code></pre>