Modern SharePoint sites changed the branding story for what a designer can (and can't) do.
In this webinar, PAIT Group's resident designer, Ryan Keller covers:
The process of creating , customizing, & installing a Theme for your SharePoint Site.
Look at how Site Scripts & Site Design can be used to create a reusable "template".
How to Automatically apply the site theme & logo when building new sites.
Embracing the Modern SharePoint: A Designer’s Perspective (Part 1)
Embracing the Modern SharePoint Part 2: Site Scripts & Site Designs