Global CSS/SASS Includes in Angular-CLI

You can globally include additional CSS/SASS style sheets into your Angular-CLI application by modifying your /angular.json file in the following hierarchy: Root -> "projects" -> "my-project-name" -> "architect" -> "build" -> "options"

Under "options", create a new array entry called "styles" if it does not exist. Within that, you can specify the relative path to your CSS/SASS file from the root of your project. For example, it may be located at "src/assets/sass".