When I embed the iframe on a WordPress Elementor page, the background color appears black. Follow the iframe link: <iframe src="https://docs.google.com/presentation/d/e/2PACX-1vTlFXw8upfjVRFAzq6SZM9Me3YT54q-WowMs80MQYSP924mEr8vg3EnAOSz4o_vNSN_qWskDDcbqmt0/embed?start=false&loop=false&delayms=3000&headers=false&rm=minimal" frameborder="0" width="960" height="569" allowfullscreen="false" mozallowfullscreen="false" webkitallowfullscreen="false"></iframe> The iframe renders as follows: I tried to change the color in WordPress, but I think the problem is with the iframe. I expect the background to appear white, the same as the page.