Change CSS list-style image based on config.toml file

I’d like to have a field within my config.toml file that controls the list-style of my generated <li> tags. Is this possible?

Generating dynamic CSS based on config file - #7 by digitalcraftsman makes it seem like I will have to hardcode the style tag within my markdown files, but I’d prefer to create a blanket solution that is applied through my theme.

Ended up using How to use Hugo Template variables in CSS! - #40 by Hash_Borgir