Branding / Whitelabel for Multiple Sites

I’ve played around a bit with the whitelabeling that WPMU DEV allows in the default installation on a site as well as the Branda plugin, however I’m wondering if there’s some way to create a “theme” that can be applied to a site for this. With many many sites on my list, I definitely don’t want to have to spend 15 to 30 minutes on each one to tweak wording and colors, etc. Though it would be nice to customize things. This would be great for reports, too, being able to have a general template created that can easily be applied – instead of having to do it for each one.