diff --git a/panel/header.css b/panel/header.css
index 8e1551f1..0f722521 100644
--- a/panel/header.css
+++ b/panel/header.css
@@ -23,7 +23,7 @@ fieldset.Header>div.output div.search>input { padding-left:25px; }
 fieldset.Header>div.output div.search>span.icon { padding:var(--input-padding) var(--button-padding); }
 fieldset.Header>div.output div.Action>div.tabs { height:100%; display:flex; justify-content:center; flex-wrap:wrap; overflow:auto; white-space:pre; }
 fieldset.Header>div.output div.Action>div.tabs div.item { font-style:italic; }
-fieldset.Header>div.output div.Action>div.tabs div.item.select { border-bottom:var(--notice-bg-color) solid 5px; }
+fieldset.Header>div.output div.Action>div.tabs div.item.select { border-bottom:var(--notice-bg-color) solid 3px; }
 fieldset.Header>div.output div.Action>div.tabs div.item:only-child { display:none; }
 body:not(.mobile) fieldset.Header>div.output div.title:first-child { width:var(--river-width); }
 body:not(.mobile) fieldset.Header>div.output div.title img { margin-right:var(--button-margin); }
diff --git a/panel/river.css b/panel/river.css
index 24fe0e32..bc5bb902 100644
--- a/panel/river.css
+++ b/panel/river.css
@@ -6,7 +6,7 @@ fieldset.River>div.output { transition:all .3s; }
 /* fieldset.River>div.output { display:flex; flex-direction:column; align-items:center; } */
 fieldset.River>div.output div.item { font-family:var(--legend-font-family); padding:var(--legend-padding); border-left:#00ffae solid 3px; }
 fieldset.River>div.output div.item:hover { color:var(--panel-hover-fg-color); }
-fieldset.River>div.output div.item.select { color:var(--panel-hover-fg-color); border-right:var(--notice-bg-color) solid 5px; }
+fieldset.River>div.output div.item.select { color:var(--panel-hover-fg-color); border-right:var(--notice-bg-color) solid 3px; }
 fieldset.River>div.output div.item>i:first-child { margin-right:var(--button-margin); }
 fieldset.River>div.output div.list div.item { border-left:#ccdc4c solid 3px; }
 fieldset.River>div.output div.list { margin-left:var(--legend-padding); }