ダークモード
https://coliss.com/articles/build-websites/operation/work/dark-mode-working-with-color-systems.html
https://coliss.com/articles/build-websites/operation/css/dark-mode-website-with-css.html
prefers-color-scheme
https://coliss.com/articles/build-websites/operation/css/one-line-dark-mode-using-css.html
hue-rotate
https://web.dev/patterns/theming/
「ダークモード」に意味はあるのか？ - GIGAZINE
Kev Quirk
氏的には不要だという結論
https://developer.apple.com/jp/design/human-interface-guidelines/dark-mode
HIG