Branding your SharePoint site with alternate style sheet: See how easy it is to brand your site by creating an alternate style sheet and populating it with CSS code overrides.
“Out of the Box” Branding Approaches: Learn about the 3 easy approaches you can use to customize the look of your site in “Out of the Box” SharePoint.
SharePoint Branding and User Interface Design Book: Wonderful book by Randy Drisgrill that walks you through everything you need to know in an understandable approach on the use of master pages, page layouts, and CSS.
Master Pages: Overview on how master pages drive the look of your SharePoint site.
Where and How to Start Branding SharePoint: Deeper dive into different approaches to applying custom CSS overrides and createing/editing master pages using Design Manager.
Using the SharePoint Color Palette Tool to Create Customized Composed Looks: Detailed post on how to create a custom color set to use with any Composed Look. Also learn how also to use it to create your own complete Composed Look so it shows up in the”Look and Feel” gallery.