update home background

static/style.css

@@ -488,6 +488,7 @@ footer ul li > a {
 .main-wrapper {
   display: -webkit-flex;
   display: flex;
+  background: #f9f9f9;
 }
 
 .main-container {

theme/templates/home.html

@@ -25,6 +25,7 @@
   position: relative;
   height: calc(100% - 190px);
   min-height: 500px;
+  background: #fff;
   transform-style: preserve-3d;
   transition: transform .6s cubic-bezier(0.785, 0.135, 0.15, 0.86), height .5s ease-out;
 }