I like to know how I can change a users admin color theme with WP CLI.
The admin color theme option is "admin_color". To set an option use the format
--option_name=setting like so:
wp user update 1 --admin_color=blue
Where 1 is the ID of the user.
If you prefer to use the user login, you can do that too:
wp user update userlogin --admin_color=sunrise
The colors should follow the names as you see them in the control panel, except for the default, which is actually 'fresh':
fresh (this is labeled 'default' on the Profile page)