diff --git a/inst/lib/bsw4/dist/spacelab/_bootswatch.scss b/inst/lib/bsw4/dist/spacelab/_bootswatch.scss
index da3131ce..dfd69112 100644
--- a/inst/lib/bsw4/dist/spacelab/_bootswatch.scss
+++ b/inst/lib/bsw4/dist/spacelab/_bootswatch.scss
@@ -28,11 +28,11 @@ $web-font-path: "https://fonts.googleapis.com/css2?family=Open+Sans:ital,wght@0,
     @include btn-shadow(map-get($theme-colors, "primary"));
   }
 
-  &.bg-dark {
+  &.bg-dark, &.navbar-inverse {
     @include btn-shadow(map-get($theme-colors, "secondary"));
   }
 
-  &.bg-light {
+  &.bg-light, &.navbar-default {
     @include btn-shadow(map-get($theme-colors, "light"));
 
     .nav-link,
diff --git a/inst/lib/bsw5/dist/spacelab/_bootswatch.scss b/inst/lib/bsw5/dist/spacelab/_bootswatch.scss
index 55dda07c..06e61bf9 100644
--- a/inst/lib/bsw5/dist/spacelab/_bootswatch.scss
+++ b/inst/lib/bsw5/dist/spacelab/_bootswatch.scss
@@ -32,7 +32,7 @@ $web-font-path: "https://fonts.googleapis.com/css2?family=Open+Sans:ital,wght@0,
     }
   }
 
-  &.bg-light {
+  &.bg-light, &.navbar-default {
     .nav-link,
     .navbar-brand {
       text-shadow: 1px 1px 0 rgba(255, 255, 255, .1);