Problem:  When embedding the Motrain store as an IFrame, the background color of the page bleeds into the IFrame:



For this case, you can insert a custom script in the Site Footer Code.  On the Thinkific Dashboard, go to:  Settings/Code&Analytics/Site Footer code 


You can specify the URL in the script and use jQuery to change the background color for this specific page. 

<script> if (location.href == '') { $('body').css('background-color','white') }
Refresh the page, and a white background will appear.