Fix the background color of unresolved comments

Again ...

Change-Id: I867acef18b0b49b81ef70e240049890218faa337
diff --git a/polygerrit-ui/app/styles/themes/app-theme.html b/polygerrit-ui/app/styles/themes/app-theme.html
index 8ad2576..fc7478b 100644
--- a/polygerrit-ui/app/styles/themes/app-theme.html
+++ b/polygerrit-ui/app/styles/themes/app-theme.html
@@ -68,7 +68,7 @@
   /* comment background colors */
   --comment-background-color: #e8eaed;
   --robot-comment-background-color: #e8f0fe;
-  --unresolved-comment-background-color: #fef7f0;
+  --unresolved-comment-background-color: #fef7e0;
   /* vote background colors */
   --vote-color-approved: #9fcc6b;
   --vote-color-disliked: #f7c4cb;