diff --git a/src/labels/mixins.scss b/src/labels/mixins.scss
index 3da49d0b11..2e351848d4 100644
--- a/src/labels/mixins.scss
+++ b/src/labels/mixins.scss
@@ -8,7 +8,7 @@
   display: inline-block;
   padding: 0 7px;
   font-size: $font-size-small;
-  font-weight: $font-weight-normal;
+  font-weight: $font-weight-semibold;
   line-height: 18px;
   border: $border-width $border-style transparent;
   border-radius: 2em;
diff --git a/src/navigation/underline-nav.scss b/src/navigation/underline-nav.scss
index 531c1ad6ae..a73c3ebe31 100644
--- a/src/navigation/underline-nav.scss
+++ b/src/navigation/underline-nav.scss
@@ -36,6 +36,7 @@
   &.selected,
   &[role=tab][aria-selected=true],
   &[aria-current]:not([aria-current=false]) {
+    font-weight: $font-weight-bold;
     // stylelint-disable-next-line primer/borders
     border-bottom-color: #f9826c; // custom coral
 
diff --git a/src/support/variables/misc.scss b/src/support/variables/misc.scss
index b7b43090d8..dd74a8fa69 100644
--- a/src/support/variables/misc.scss
+++ b/src/support/variables/misc.scss
@@ -22,7 +22,7 @@ $box-shadow-inset: inset 0 1px 0 rgba($border-color, 0.2) !default; // top inner
 $box-shadow-focus: 0 0 0 3px rgba($border-blue, 0.3) !default; // blue focus ring
 
 // Button variables
-$border-color-button: rgba($black, 0.12) !default;
+$border-color-button: $black-fade-15 !default;
 $btn-active-shadow: inset 0 0.15em 0.3em $black-fade-15 !default; // TODO: Deprecate?
 
 // Form variables