Visit Ulysses Style Exchange and click
If you are a git user, you can install the theme and keep up to date by cloning the repo:
git clone https://github.com/dracula/ulysses.git
Download using the GitHub .zip download option and unzip them.
Ulysses > Preferences...
Draculain the list of themes at the bottom.
Get updates about this theme and more. 7,399 people enjoy it.
This theme wouldn't exist without these people. Wanna help too? Check the repository on GitHub.