Im having alot of trouble with this, and the apparent solutions aren't working or im doing something wrong (probably the latter). I want to style my mat-menu and the mat-menu-item's, ive tried doing this: ::ng-deep .mat-menu{ background-color:red; } But it doesnt work, my menu looks like this (nothing abornomal) <mat-menu #infoMenu="matMenu"> <button mat-menu-item> <mat-icon>dialpad</mat-icon> <span>Resume</span> </button> <button mat-menu-item> <mat-icon>voicemail</mat-icon> <span>Portfolio</span> </button> <button mat-menu-item> <mat-icon>notifications_off</mat-icon> <span>References</span> </button> <button mat-menu-item> <mat-icon>notifications_off</mat-icon> <span>Contact</span> </button> </mat-menu> I have also tried /deep/ but I know that shouldn't work and in fact should be depreciated in Angular 4 but I did it to test, I am not sure how to style the elements at this point. Continue reading...