Odyssey theme for 2.79 - Released Scripts and Themes - Blender Artists Community
Blend Swap | very pink theme
Blender Themes | MeshLogic
Blend Swap | Category: Themes
Call for Content: Themes - User Feedback - Developer Forum
Call for Content: Themes - User Feedback - Developer Forum
Here's Blender 2.8 Theme for Blender 2.7 - Released Scripts and Themes - Blender Artists Community
Blender Add-on Overview: Theme Switcher (free) and installing new themes - YouTube
Themes for Blender
2.79 theme for 2.8 - Blender Stack Exchange
Blender - Windows 98 Theme
Download – Studio LLB
Themes for Blender
Blender 2.80, now available the version that marks a new beginning | Ubunlog
i made a blender theme i call "blackout" (i made this in 2.79, so i don't know if it will work in 2.91 but download link will be comming hopefully soon) :
Blender Themes | MeshLogic
How to install XSIMOD theme for Blender (2.79 series) - YouTube