If you want to contribute your own color themes or any themes you collected over time, please do so by using the project's repository found in github.
- Fork the xcolors repository.
- Add your theme file(s) in the themes folder found in the project's root directory
- Commit the newly added files.
- Make a pull request.
- New themes will show here as soon as I push the changes at heroku.
For more info for supported file formats see the README file found in the git repository.