Fix pre color (#28966)

diff --git a/scss/_variables.scss b/scss/_variables.scss
index 29961e4dd51e235d776af3e50625b7db0218e32b..7b28d94ddbb7f98ef68019c7a43d8691da435393 100644 (file)
--- a/scss/_variables.scss
+++ b/scss/_variables.scss
@@ -1100,5 +1100,5 @@ $kbd-font-size:                     $code-font-size !default;
 $kbd-color:                         $white !default;
 $kbd-bg:                            $gray-900 !default;
 
-$pre-color:                         $gray-900 !default;
+$pre-color:                         null !default;
 $pre-scrollable-max-height:         340px !default;