These are the settings I use on iOS 11 to obtain this clean, minimal, and semi-dark appearance when I'm using my iPhone. I'll show you how I change the color contrast, make the text smaller, apply a crescent Earth wallpaper, install the SwiftKey keyboard, and a few other things to get the appearance for iOS that I use daily!
Wallpaper 1: https://ios.gadgethacks.com/how-to/do...
Wallpaper 2: https://drive.google.com/file/d/1G09O...