"You don't brand Outlook or Word. Why do you need to do branding on collaboration sites?"
Well, we want to :-) SharePoint is supposed to be great again. It is a development platform. So why not? :-)
Well, I've been working with SharePoint for a long time and it was always possible to define URL address to a CSS file and style the pages. Team Sites and other SharePoint Foundation sites were born with Microsoft blue colors, and we immediately got to learn everything about feature stapling. Yes, cool kids feature staple.
Still, in my opinion, we should have a place in SharePoint or Office 365 UI where we can set URL to a custom stylesheet.
Then I was thinking about Microsoft talking about disruption, multiple platforms and how SharePoint developers are now web developers.
So I found a place. Call it disruption, baby. The place is called browser, whether it be Chrome, Internet Explorer, Firefox, Safari, Edge, Opera or else. As a web developer, I can now code that too ;-)
For a starter, I made a Chrome addon, called Sans Style. A little button in browser that opens a form. It is an extension to Chrome browser. A form where you can define a website and a stylesheet and save it. Once saved, the Sans Style addon adds the custom CSS to the website, you defined each time you open the website.
So now I can brand SharePoint, I can brand SharePoint modern pages, I can brand almost any website. Others need the SansStyle addon with the website and CSS defined in order to see the branding. It kind of works as Ad Blocker, it just adds style to a website.
It's free. Get it at Chrome web store Awesome to style SharePoint with CSS on localhost (Read more at http://sp2013.blogspot.com/2017/03/sharepoint-branding-office-365-classic.html)
I also manged to make Facebook red. But, I don't have to change Facebook or CNN. SharePoint and Office 365, as a development platform? Yes!
I also wrote
SharePoint Branding Office 365 classic and modern - CSS file on localhost
SharePoint Branding Modern Pages
Digitization, automation, artificial intelligence and robots
Career in IT. Sex drugs and rock and roll
SharePoint Store - Buying an Add-in, the Customer View
Points: Developer's Guide to App Business Value
Ups, I sold an app to 1 billion people!