diff --git a/pkg/web_css/lib/src/_base.scss b/pkg/web_css/lib/src/_base.scss
index 32a777b52..dd663fd34 100644
--- a/pkg/web_css/lib/src/_base.scss
+++ b/pkg/web_css/lib/src/_base.scss
@@ -459,15 +459,18 @@ a.-x-ago {
   top: 0;
   left: 0;
   right: 0;
-  background: var(--pub-session_warning-background-color);
+  background: var(--pub-selected-bgColor);
+  color: var(--pub-neutral-textColor);
   padding: 12px 24px;
   text-align: center;
   font-size: 14px;
   font-weight: bold;
   box-shadow: 0px 0px 2px 2px rgba(0, 0, 0, 0.05);
+  z-index: 101; // TODO: depend on variables with the site header
 
   button {
     background-color: transparent;
+    color: var(--pub-neutral-textColor);
     margin-left: 8px;
     padding: 8px;
   }
diff --git a/pkg/web_css/lib/src/_variables.scss b/pkg/web_css/lib/src/_variables.scss
index bc230508f..ed6899116 100644
--- a/pkg/web_css/lib/src/_variables.scss
+++ b/pkg/web_css/lib/src/_variables.scss
@@ -53,8 +53,6 @@
   --pub-searchbar_suggest_hover-background-color: #455060;
   --pub-searchbar_suggest-text-color: #a9a9a9;
 
-  --pub-session_warning-background-color: #ffffaa;
-
   --pub-site_header_banner-background-color: #1C2834;
   --pub-site_header_banner-text-color: #f8f9fa;
   --pub-site_header_banner_hover-background-color: #2b3d50; // 10% lighter than bg color