invert dropdown styles in navbar for inverse variation

dist/css/bootstrap.css

@@ -3415,6 +3415,29 @@ button.close {
   border-bottom-color: #ffffff;
 }
 
+@media (max-width: 767px) {
+  .navbar-inverse .navbar-nav .open .dropdown-menu > li > a {
+    color: #999999;
+  }
+  .navbar-inverse .navbar-nav .open .dropdown-menu > li > a:hover,
+  .navbar-inverse .navbar-nav .open .dropdown-menu > li > a:focus {
+    color: #ffffff;
+    background-color: transparent;
+  }
+  .navbar-inverse .navbar-nav .open .dropdown-menu > .active > a,
+  .navbar-inverse .navbar-nav .open .dropdown-menu > .active > a:hover,
+  .navbar-inverse .navbar-nav .open .dropdown-menu > .active > a:focus {
+    color: #ffffff;
+    background-color: #080808;
+  }
+  .navbar-inverse .navbar-nav .open .dropdown-menu > .disabled > a,
+  .navbar-inverse .navbar-nav .open .dropdown-menu > .disabled > a:hover,
+  .navbar-inverse .navbar-nav .open .dropdown-menu > .disabled > a:focus {
+    color: #444444;
+    background-color: transparent;
+  }
+}
+
 @media screen and (min-width: 768px) {
   .navbar-nav {
     float: left;

less/navbar.less

@@ -419,7 +419,38 @@
         }
       }
     }
+
+    @media (max-width: @screen-phone-max) {
+      // Dropdowns get custom display
+      .open .dropdown-menu {
+        > li > a {
+          color: @navbar-inverse-link-color;
+          &:hover,
+          &:focus {
+            color: @navbar-inverse-link-hover-color;
+            background-color: @navbar-inverse-link-hover-bg;
+          }
+        }
+        > .active > a {
+          &,
+          &:hover,
+          &:focus {
+            color: @navbar-inverse-link-active-color;
+            background-color: @navbar-inverse-link-active-bg;
+          }
+        }
+        > .disabled > a {
+          &,
+          &:hover,
+          &:focus {
+            color: @navbar-inverse-link-disabled-color;
+            background-color: @navbar-inverse-link-disabled-bg;
+          }
+        }
+      }
+    }
   }
+
 }