diff --git a/app/assets/stylesheets/experiments.scss b/app/assets/stylesheets/experiments.scss
index 651c5cd89..215ae29fe 100644
--- a/app/assets/stylesheets/experiments.scss
+++ b/app/assets/stylesheets/experiments.scss
@@ -87,7 +87,7 @@
 
               img {
                 border-radius: 4px;
-                max-height: 76px;
+                max-height: 70px;
               }
             }
           }
@@ -482,7 +482,8 @@
         .card.experiment-card {
           .workflow-img-wrapper {
             align-items: center;
-            background-color: $color-alto;
+            background-color: $color-concrete;
+            border: 1px solid $color-silver-chalice;
             display: flex;
             justify-content: center;
           }
diff --git a/app/services/experiments/generate_workflow_image_service.rb b/app/services/experiments/generate_workflow_image_service.rb
index b4a31e06f..88f18e9e2 100644
--- a/app/services/experiments/generate_workflow_image_service.rb
+++ b/app/services/experiments/generate_workflow_image_service.rb
@@ -17,7 +17,7 @@ module Experiments
         splines: true,
         center: true,
         pack: true,
-        bgcolor: Constants::COLOR_CONCRETE
+        bgcolor: 'transparent'
       }
       @node_params = {
         color: Constants::COLOR_VOLCANO,