In AngularJS is possible to style tooltips in CSS using the selector .md-tooltip What is the way to have custom format tooltips in Angular 4? EDIT: I am using Angular 4 & Material2. An example of how I am using it is: <span mdTooltip='TEST' mdTooltipPosition='right'>TEST</span> It shows the tooltip pretty fine, except the fact that I don´t know how to style it. Continue reading...