If you are not very familiar with Webflow, we highly recommend you to take the Webflow 101 Crash Course from Webflow University, as it will teach you all the basics to get up and running.
Inside the "Starter" directory, you'll find two pages titled "Dark Mode" and "Light Mode". This templates include a navigation bar, a footer and all interactions you'll need – the ideal starting point for your pages.
The Style Guide page demonstrates the display of all base elements found in this template. The Style Guide provides a central location to make stylistic changes to your site.
Inside the Project Settings, in the Custom Code tab you'll notice some style code has been added to the head of each page.This code is to ensure that the text rendering is smooth and consistent across all browsers. It does not require any action on your part.
You can duplicate the Light Mode Page in the "Starter" folder or pick any page and
Delete the [Preloader] Dark Mode and paste the [Preloader] Light Mode from the Symbols.
Delete the [Dark Mode] Button and paste the [Light Mode] Button from the Symbols.
Add the "(🎯click) Switch to White mode" Interaction on load
All this steps as Loom video here.