Not sure I understand your question?
However, you can change the color of your Stage in Animate, and that will determine the color rendered on the body section of the page within the browser window.
Hope this helps, but if I misunderstood your question, please reply with more details.
<body style="margin: 0; padding: 0; background-color: rgba(255,255,255,1.00);">
<div id="Stage" class="EDGE-000000">
copy and past in the exact same place you see this in your html page code .replace EDGE-000000 with your edge animation class info.. if i understand what you mean this should turn the browser colour white. not touching you animation