diff --git a/newIDE/app/scripts/theme-templates/theme.json b/newIDE/app/scripts/theme-templates/theme.json
index 67977f03a0c1..6e8f32b972ef 100644
--- a/newIDE/app/scripts/theme-templates/theme.json
+++ b/newIDE/app/scripts/theme-templates/theme.json
@@ -563,7 +563,7 @@
       },
       "even": {
         "background-color": {
-          "value": "252525"
+          "value": "#252525"
         }
       },
       "selected": {
@@ -576,4 +576,4 @@
       }
     }
   }
-}
\ No newline at end of file
+}