schema download
There is a zip or tar file in the upper right corner of http://iterm2colorschemes.com/ . After downloading and decompressing, there is a schema folder, which is full of shcema files. There are many renderings under the screenshots folder, you can read and mark the name of your favorite color scheme, and then import it into iterm.
set up
iterm2 -> Preferences…
Profiles -> Colors -> Import…
Select any file under the zip decompressed schemes.
After importing, you can see the content you just imported in Color Presetes... Just select it and it's ok.
Finally, send out a few screenshots that I like
* spacedust
* material_dark