A really good extension for Safari makes otherwise really bright websites dark. Here's Amazon for example, light, dark
You can also manually enable, or disable for certain websites depending on how it appears, i.e with OzBargain dark mode already turned on, the extension makes it all look a little strange, so I have it disabled. Works well for Gmail.
Works on Mac Safari and iOS Safari.
This Safari extension offers a dark navigation mode in Safari. Neo Black night mode adds a beautiful theme to each page you visit. It is based on the Dark Reader project used by more than 4,000,000 users. Thus, the appearance of dark mode on each website has been carefully tested.
Enjoy!
This app seems to be a knock-off of Noir, an app with a similar name, icon, and functionality.
EDIT: and yes, Noir was first. It’s version history goes back to Feb 2021, whereas this app starts at Sept 2021