Gold Nugget #6 Shiny New Blender Theme – Made by yours truly.
I finally got my favorite theme posted to the devtalk.blender.org website under their “Call for Content: Themes” posting.
My theme is called Deep Blue Something (you can Ctrl + F) to find it in the web address below…
https://devtalk.blender.org/t/call-for-content-themes/3174/523
I have found this theme has really helped my workflow. Just install it in Blender Preferences under the Themes tab and click “Install” and then navigate to your theme file.

Pro Tip #1: If you continue customizing a theme that you loaded and want to save it: you can hit the ‘+’ icon and save it with the exact same theme name to Overwrite the previous theme (or save a new name).
Pro Tip #2: Saved themes reside on your current install of blender. On windows this path is (replace underlined text): C:\Users\YOURWINDOWSUSERNAME\AppData\Roaming\Blender Foundation\Blender\CURRENTVERSION\scripts\presets\interface_theme
If you have a theme that you love. Go ahead and add it to the community.