added a new class for the login card to allow changing the card colour, etc

src/Ombi/ClientApp/src/app/login/login.component.html

@@ -3,7 +3,7 @@
 <div class="small-middle-container">
     <div *ngIf="form && customizationSettings && authenticationSettings">
 
-        <mat-card class="mat-elevation-z8 top-margin">
+        <mat-card class="mat-elevation-z8 top-margin login-card">
             <img mat-card-image *ngIf="!customizationSettings.logo" src="{{baseUrl}}/images/logo.png">
             <img mat-card-image *ngIf="customizationSettings.logo" [src]="customizationSettings.logo">
             <mat-card-content id="login-box" *ngIf="!authenticationSettings.enableOAuth || loginWithOmbi">

src/Ombi/ClientApp/src/app/login/login.component.scss

@@ -229,3 +229,6 @@ div.bg {
 .login-buttons {
     text-align: center;
 }
+.login-card {
+    background: #424242;
+}