That's exactly what I do on my personal website. At the bottom of every page is a button which inverts the color scheme to white text and black background.[1] I

That's exactly what I do on my personal website. At the bottom of every page is a button which inverts the color scheme to white text and black background.[1] It sets a cookie, so the setting should persist across all pages. 1. e.g. scroll to the bottom of https://geoff.greer.fm/2017/02/28/software-rot/ https://geoff.greer.fm/2017/02/28/software-rot/ and click "go dark".