Community-made theme, originally shipped with Blender up to version 4.1
This theme is no longer maintained.
New maintainers welcome! Please reach out by opening an issue in the tracker at: https://projects.blender.org/extensions/theme_xsi/issues
Initial release based on the version bundled with Blender 4.1
Not only does it bring back old and much-loved memories of the amazing XSI, but it is also easy on the eyes.
Well done.