Fix background color

build/less/AdminLTE.less

 /*!
- *   AdminLTE v2.4.0
+ *   AdminLTE v2.4.2
  *   Author: Almsaeed Studio
  *	 Website: Almsaeed Studio <https://adminlte.io>
  *   License: Open source - MIT

build/less/core.less

@@ -71,7 +71,7 @@ body {
 
 .content-wrapper  {
   min-height: 100%;
-  background-color: @body-bg;
+  background-color: @content-bg;
   z-index: 800;
 }
 

build/less/variables.less

@@ -45,7 +45,8 @@
 @link-hover-color: lighten(@link-color, 15%);
 
 // Body background (Affects main content background only)
-@body-bg: #ecf0f5;
+@body-bg: #ecf0f5; // DEPRECATED
+@content-bg: #ecf0f5;
 
 // SIDEBAR SKINS
 // --------------------------------------------------------

dist/css/AdminLTE.css

@@ -95,7 +95,7 @@ body {
 }
 .content-wrapper {
   min-height: 100%;
-  background-color: #ffffff;
+  background-color: #ecf0f5;
   z-index: 800;
 }
 .main-footer {

package.json

 {
   "name": "admin-lte",
-  "version": "2.4.0",
+  "version": "2.4.2",
   "main": "dist/js/adminlte.min.js",
   "repository": {
     "type": "git",