Changing colors and styling of collection_select dropdown with rails bootstrap and select2 implemented
<p>I want to change the colors and style a dropdown in rails to match the rest of my web app styling. I am using Rails, Bootstrap, and select2 and I have no idea where to add css and how to even begin accessing the the different parts of the dropdown so that I can color them and make them fit with the rest of the design on the app. </p>

<p>this is the implementation of  the dropdown </p>

<pre><code>&lt;%= collection_select(:id, :name, @product, :id, :name,{:include_blank =&gt; true},{class: "js-example-basic-single" }) %&gt; 
</code></pre>

<p>Please advise me on how to accomplish styling this item, thanks. </p>