diff --git a/package-lock.json b/package-lock.json
index 154ead35..16504812 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -2680,9 +2680,9 @@
       }
     },
     "@primer/primitives": {
-      "version": "0.0.0-0981f9b",
-      "resolved": "https://registry.npmjs.org/@primer/primitives/-/primitives-0.0.0-0981f9b.tgz",
-      "integrity": "sha512-ph5+Fw0u0BdJIjG91vZaPj9txkToJP1jzlxx5+rVauFnMtab/sfNbUKvR06YTiAlozP37kKvwU1gKqonUuWiHQ=="
+      "version": "0.0.0-773ac4d",
+      "resolved": "https://registry.npmjs.org/@primer/primitives/-/primitives-0.0.0-773ac4d.tgz",
+      "integrity": "sha512-MxPORPgId2Zjes44LrPpyu+5LSlFr89yG0ybmmrosfGXn4HHLBhpHZRkDVb4HtTErapkjN0z+IbVZqmvREFbPg=="
     },
     "@reach/router": {
       "version": "1.3.3",
diff --git a/package.json b/package.json
index 7bb15e26..7ced2a1a 100644
--- a/package.json
+++ b/package.json
@@ -41,7 +41,7 @@
   },
   "dependencies": {
     "@primer/octicons": "^9.1.1",
-    "@primer/primitives": "0.0.0-0981f9b"
+    "@primer/primitives": "0.0.0-773ac4d"
   },
   "devDependencies": {
     "@octokit/rest": "^16.34.0",
diff --git a/src/base/base.scss b/src/base/base.scss
index 57fc7d89..63a9eb56 100644
--- a/src/base/base.scss
+++ b/src/base/base.scss
@@ -45,7 +45,7 @@ hr,
   overflow: hidden;
   background: transparent;
   border: 0;
-  border-bottom: $border-width $border-style var(--color-border-tertiary);
+  border-bottom: $border-width $border-style var(--color-border-primary);
   @include clearfix();
 }
 
diff --git a/src/navigation/menu.scss b/src/navigation/menu.scss
index ec6e5ab0..986cb835 100644
--- a/src/navigation/menu.scss
+++ b/src/navigation/menu.scss
@@ -48,6 +48,7 @@
   &[aria-selected=true],
   &[aria-current]:not([aria-current=false]) {
     cursor: default;
+    background-color: var(--color-menu-bg-active);
 
     &::before {
       position: absolute;
diff --git a/src/navigation/underline-nav.scss b/src/navigation/underline-nav.scss
index 06f7175b..55a33054 100644
--- a/src/navigation/underline-nav.scss
+++ b/src/navigation/underline-nav.scss
@@ -27,6 +27,7 @@
 
   &:hover,
   &:focus {
+    color: var(--color-underlinenav-text-hover);
     text-decoration: none;
     border-bottom-color: var(--color-border-tertiary);
     outline: 1px dotted transparent; // Support Firfox custom colors