diff --git a/public/less/generics.less b/public/less/generics.less
index 5337609b4f..fee1157662 100644
--- a/public/less/generics.less
+++ b/public/less/generics.less
@@ -1,3 +1,20 @@
+.define-if-not-set() {
+	@gray-base:              #000;
+	@gray-darker:            lighten(@gray-base, 13.5%); // #222
+	@gray-dark:              lighten(@gray-base, 20%);   // #333
+	@gray:                   lighten(@gray-base, 33.5%); // #555
+	@gray-light:             lighten(@gray-base, 46.7%); // #777
+	@gray-lighter:           lighten(@gray-base, 93.5%); // #eee
+
+	@brand-primary:         darken(#428bca, 6.5%); // #337ab7
+	@brand-success:         #5cb85c;
+	@brand-info:            #5bc0de;
+	@brand-warning:         #f0ad4e;
+	@brand-danger:          #d9534f;
+}
+
+.define-if-not-set();
+
 .category-list {
 	padding: 0;
 
diff --git a/public/less/mixins.less b/public/less/mixins.less
index 4bee3f27bd..57a54ea32b 100644
--- a/public/less/mixins.less
+++ b/public/less/mixins.less
@@ -79,4 +79,9 @@
 	height: @size;
 	line-height: @size;
 	font-size: @font-size;
+}
+
+.box-shadow(@shadow) {
+	-webkit-box-shadow: @shadow;
+	box-shadow: @shadow;
 }
\ No newline at end of file