Darkmode Dashboard

So i've been tasked with converting an existing dashboard into a darkmode, easy enough with reports, works fine. But theme chaning the dashboard itself leaves the top left and right of the tile with a white background. looking at the page code using inspection its something called the exploratory frame that seems to be hard coded to be white. any advice on how to change that? I can change the pages color code manually  but that would mess up on refresh or reopening.