You just need to enable lsp-sematnic-tokens-enable

https://github.com/ericdallo/dotfiles/blob/master/.doom.d/config.el#L137

what about colors?

syntax highlighting? defined variable show with same colors as functions when used

you can customize each face lsp-face-semhl-comment for exmaple

ah now i get it, didn't know they are called faces. Thanks

yes, mostly everything that has color on emacs are faces

M-x describe-faces may help you navigate all available faces SPC h F for doom