theming - resolves some variable defintions to help with edX theme

lms/static/sass/base/_variables.scss

@@ -87,7 +87,7 @@ $dashboard-profile-header-color: transparent;
 $dashboard-profile-color: rgb(252,252,252);
 $dot-color: $light-gray;
 
-$content-wrapper-bg: rgb(255,255,255);
+$content-wrapper-bg: shade($body-bg, 2%);
 $course-bg-color: #d6d6d6;
 $course-bg-image: url(../images/bg-texture.png);
 

lms/static/sass/multicourse/_account.scss

@@ -107,7 +107,7 @@
     @include clearfix;
     margin: 0 auto;
     width: 960px;
-    background: $body-bg;
+    background: $white;
   }
 
   .container {