diff --git a/src/assets/styles/icons.scss b/src/assets/styles/icons.scss
index 11d20360..2771763f 100644
--- a/src/assets/styles/icons.scss
+++ b/src/assets/styles/icons.scss
@@ -42,6 +42,10 @@
         width: 32px;
     }
 
+    &.gray {
+        opacity: 50%;
+    }
+
     &.icon-inventory {
         background-image: url('../images/toolbar/icons/inventory.png');
         height: 41px;