diff --git a/src/scss/_variables.scss b/src/scss/_variables.scss
index 33d2b47f7..3495d4af4 100644
--- a/src/scss/_variables.scss
+++ b/src/scss/_variables.scss
@@ -180,9 +180,6 @@ $border-color-translucent: rgba($text-muted, $border-opacity) !default;
 $border-color-light: mix($text-muted, #ffffff, percentage($border-light-opacity)) !default;
 $border-color-light-translucent: rgba($text-muted, $border-light-opacity) !default;
 
-$border-color-dark: mix($text-muted, #ffffff, percentage($border-dark-opacity)) !default;
-$border-color-dark-translucent: rgba($text-muted, $border-dark-opacity) !default;
-
 $border-color-active: mix($text-muted, #ffffff, percentage($border-active-opacity)) !default;
 $border-color-active-translucent: rgba($text-muted, $border-active-opacity) !default;