Somewhat inspired by gruvbox, Helios is a dark, saturated base16 scheme with nice clean colors.

1. Install a base16 builder. I like pybase16, so that's the one I'm going to use in these instructions
2. Make a folder to hold all of the builder files. For example, ~/base16
3. In that folder, run pybase16 update. This will download all of the official base16 schemes and templates
4. Now that all of the official schemes are downloaded, run pybase16 build -s helios
5. There will now be an output folder with all of the generated themes for various applications

Alternatively, if you don't want to mess with builders, I went ahead and generated all of the output themes myself and uploaded them to another repo here