The Grey Night Theme by ksya

Add the following code to your configuration.yaml file (reboot required).

frontend:
  ... # your configuration.
  themes: !include_dir_merge_named themes
  ... # your configuration.

1. Go to the Community Store.
2. Search for Grey Night.
3. Navigate to Grey Night theme.
4. Press Install.
5. Go to services and trigger the frontend.reload_themes service.

Clone this repository in your existing (or create it) themes/ folder.

cd themes/
git clone https://github.com/home-assistant-community-themes/grey-night.git

Or using submodules:

cd themes/
git submodule add https://github.com/home-assistant-community-themes/grey-night.git