diff --git a/modules/resources-generator.js b/modules/resources-generator.js
index b2281717..162922bc 100644
--- a/modules/resources-generator.js
+++ b/modules/resources-generator.js
@@ -583,6 +583,7 @@ window.Resources = (function () {
       resource.expected = ~~expected; // temp
       resource.max = gauss(expected, expected / 2, expected / 5, cellsN, 0); // temp
       resource.cells = 0;
+      resource.stroke = d3.color(resource.color).darker(2).hex();
       return resource;
     });