Changing colour schemes

I have been experimenting with different colour schemes and recently found this repo with ones that I like. How do I install themes from here? Pre v8 I had installed them but I now do not remember how I did that. Also there is a color scheme shown for pcbnew on the main KiCad website. How do I get this specific colour scheme?

Some information here:

Install color themes:

You can select different color themes for symbol editor, schematic, etc. Just select the appropiate editor and then choose the color theme.

Example: select the color theme in schematic
pref

Edit: You can add more themes downloading them in .zip and installing them:

Thanks. I am aware of how to change the colors. The install from file is a helpful tip. I hadn’t noticed that. I compressed one of the theme folders and tried adding them as a file, however this led to an error. I finally opened the packages directory and copied these the color folders there. Not all of them work but the ones I wanted do work.