Definitely recommend visiting their list of swift blogs. Nicely aggregates different sources, as a primarily iOS dev, it's a great way for me to catch up every once in a while on the dozens of blogs I don't want to follow daily.

I think it's the Atom default dark theme, or similar to it. The font used is Operator. https://www.typography.com/blog/introducing-operator

Operator Mono + Sublime with Spacegray + Oceanic Next

Awesome, thanks for the correction. For the gp, if you haven't seen the base16 stuff there's a lot of similar themes to choose from to get the right one for you.https://chriskempson.github.io/base16/

Oh cool thanks! useful link too