Refine theme

src/theme/_variables.scss

@@ -3,7 +3,7 @@
 // (imported above). For each palette, you can optionally specify a default, lighter, and darker
 // hue. Available color palettes: https://www.google.com/design/spec/style/color.html
 $arsnova-primary: mat-palette($mat-teal,300);
-$arsnova-accent: mat-palette($mat-orange, A200); //$mat-blue-gray, A200, A100, A400);
+$arsnova-accent: mat-palette($mat-orange, 100); //$mat-blue-gray, A200, A100, A400);
 
 // The warn palette is optional (defaults to red).
 $arsnova-warn: mat-palette($mat-light-blue, 100);