diff --git a/src/scss/cdb-components/boxes.scss b/src/scss/cdb-components/boxes.scss
index 4211c1d..77f6653 100644
--- a/src/scss/cdb-components/boxes.scss
+++ b/src/scss/cdb-components/boxes.scss
@@ -56,7 +56,7 @@
   border-radius: 4px;
   background: $cThirdBackground;
   &.is-alert {
-    background: rgba($cHighlightYellow, 0.60);
+    background: rgba($cHighlightYellow, 0.6);
   }
 }