Hi Michaella,
The section you mentioned is already transparent, but the background color is coming from the top of the page where the background color is set to white. I would suggest you add the following custom CSS code into the Theme Options > CSS to change that color.
.site, .x-site
{
background-color: #cccccc !important;
}
But changing background color may not serve your purpose, as you are expecting the section to be transparent which is already transparent.
Please remember that the above code will work if copied as it is and don’t conflict with any existing style.
Please note that the code provided serves only as a guide to help you get started custom coding on your own if there’s no option offered in our theme or the products we bundle.
We really do not provide support for custom codes that means we can’t fix it in case it conflicts with something on your site nor will we enhance it.
Thanks