How do I specify a light and dark color theme?

Question:
How do I specify a light and dark color theme?

Product:
Wix Studio.

What are you trying to achieve:
I’m trying to make it so that the browser matches with the site on both themes.

What have you already tried:
Doing two meta tags and putting it all in one.

Additional information:

Anything? I put a comment just to bump it up, I know I posted this kinda late last night.