Fixed topbar

src/app/layout/topbar/topbar.component.html

@@ -1,4 +1,4 @@
-<mat-toolbar class="topbar" (keydown)="onKeydown($event)">
+<mat-toolbar class="topbar" color="primary" (keydown)="onKeydown($event)">
   <a class="brand" routerLink="/">
     <img class="logo-dot" src="{{AssetsConstants.LOGO}}" alt="" aria-hidden="true" draggable="false"
       oncontextmenu="return false;">