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Safari uses "theme-color" to tint its navigation bar at the top. <meta name="theme-color" content="#bb1919"> BBC News uses red color, so the whole browser is red (https://www.bbc.com/news😞 Problem is, if you drag page away from right side or bottom, there is also red color under it. 1. Is there a way to set "system" (under page) background, besides "theme-color"? Let's say, I want for navigation bar to be red, but background from right to be white. 2. If going into weird hacking and using negative margins on html/body to stretch content beyond bounds, is there a stable way to compensate scrolling bounds without breaking the whole layout?