diff --git a/less/_colors.less b/less/_colors.less
index 3c9a99f9..44b2da88 100644
--- a/less/_colors.less
+++ b/less/_colors.less
@@ -343,6 +343,5 @@ Then, run this script to get the list.
 @blue-grey-900: #263238;
 
 
-@: undefined;
-@-Black: #000000;
-@-White: #ffffff;
+@black: #000000;
+@white: #ffffff;