The "Rubecula" theme is a hyperminimal theme based on AmCoder Bright with some changes but faithful to the colour scheme. Additionally there is the "Rubecula Dawn" theme which is its light version for during the day.
template.js contains the colors and logic to convert the template to a valid color scheme file with colors. The file requires that sed is available on your PATH. However this file is only required for testing as the formatted color scheme is not added to the repository.