How to change the color of this pop-up menu?

Hi everyone,

Currently im developing a custom metabase version.
I've modifed the colors.css and the colors.ts and everything is fine...but i need a "dark theme" in my version.

The main problem are all the pop-up, which i can't modify the white backgrounds, even if i use a dark bg in all the css.

do you guys have any tips to do this ?

thank you in advance.