Change primary and accent color themes

ng-app/src/theme.scss

@@ -37,8 +37,8 @@ $quotes-theme-background: (
 );
 
 $quotes-theme: (
-    primary: mat-palette($mat-blue),
+    primary: mat-palette($mat-indigo),
-    accent: mat-palette($mat-pink),
+    accent: mat-palette($mat-blue-gray),
     warn: mat-palette($mat-red),
     is-dark: true,
     foreground: $quotes-theme-foreground,