[HUD] Light green success color for light mode (#6452)

We should add a pending color at some point too

old:
<img width="382" alt="image"
src="https://github.com/user-attachments/assets/004dd4e0-8486-4171-9799-b4b6b3e07db4"
/>

new:
<img width="459" alt="image"
src="https://github.com/user-attachments/assets/f840e6c6-0156-41fe-a6b0-d86fab79b546"
/>

Author: clee2000

torchci/styles/globals.css

@@ -26,7 +26,7 @@
   --workflow-box-none-bg: lightgray;
   --workflow-box-fail-bg: mistyrose;
   --workflow-box-pending-bg: azure;
-  --workflow-box-success-bg: lightgreen;
+  --workflow-box-success-bg: #efffef;
   --workflow-box-classified-bg: linen;
   --workflow-box-highlight-border: #5eced4;
   --workflow-box-highlight-shadow: rgba(81, 203, 238, 1);