I think this is great. No-one is forcing you to implement this and if you do change a few colours here and there to benefit those users who use dark mode - it'd

I think this is great. No-one is forcing you to implement this and if you do change a few colours here and there to benefit those users who use dark mode - it'd be hugely appreciated. And for those worried about adding weight to your page just explicitly use the media query and put the over-rides in a separate file: <link media="(prefers-color-scheme: dark)" src="..." rel="stylesheet" />