Please roll out Dark Mode for Evernote for Mac. All you need to do now is conform to MacOS Mojave. A dark sidebar does not address the problem. Working with what are effectively Notes in many apps including some non-Apple apps with white text on a dark background takes away huge amounts off eye strain staring at a screen for long periods. It also makes the battery on a laptop last much longer. If you want a model for how this would look the Apple Notes app is a very good template. I'm not saying that I'm close to thinking of switching over but the lack of dark mode in Evernote has given me a reason to check out just how much Notes has caught up with Evernote.