Freemind contains luxuriant color themes for your choice. To use one of them, simply modify the theme and inverse settings from your theme _config.yml file e.g.
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, where theme here indicates which theme you are going to use, and inverse here says you want inverse color scheme on some important components such as navigation bar and header title.
User contributions are welcome! If you want to contribute a color theme, you can fork the dev branch . Write a new theme in LESS and send me a pull request.