update

src/variables.scss

@@ -0,0 +1,20 @@
+@import '~@angular/material/theming';
+
+$light-primary: mat-palette($mat-gray, 800);
+$light-accent: mat-palette($mat-pink, A200, A100, A400);
+$light-warn: mat-palette($mat-red);
+
+
+$primary: mat-color($light-primary);
+$accent: mat-color($light-accent);
+$warn: mat-color($light-warn);
+
+$dark-primary: mat-palette($mat-grey, 900, 500, 700);
+$dark-accent: mat-palette($mat-amber, A200, A100, A400);
+$dark-warn: mat-palette($mat-deep-orange);
+
+.dark-theme {
+  $primary: mat-color($dark-primary);
+  $accent: mat-color($dark-accent);
+  $warn: mat-color($dark-warn);
+}