Update background color

Author: GuidoBR

frontend/src/pages/Reports/ReportDetailPage.scss

@@ -2,7 +2,6 @@
   --background: var(--ion-color-light);
 
   &__header {
-    background-color: #fff;
     border-bottom: 1px solid var(--ion-color-light-shade);
     padding-bottom: 1rem;