diff --git a/map_machine/scheme/default.yml b/map_machine/scheme/default.yml
index 6fc6297..9818195 100644
--- a/map_machine/scheme/default.yml
+++ b/map_machine/scheme/default.yml
@@ -225,6 +225,7 @@ material_colors:
 
   bronze: "#CD7F32"
   concrete: "#AAAAAA"
+  glass: "#CCEEFF"
 
 node_icons: