Ticket #45689: 45689.2.patch

src/wp-content/themes/twentynineteen/sass/navigation/_menu-main-navigation.scss

@@ -169 +169 @@
                                 color: $color__background-body;
                                 display: block;
                                 line-height: $font__line-height-heading;
+                                text-shadow: none;
                                 padding: calc( .5 * #{$size__spacing-unit} ) calc( 24px + #{$size__spacing-unit} ) calc( .5 * #{$size__spacing-unit} ) $size__spacing-unit;
                                 white-space: nowrap;
 

src/wp-content/themes/twentynineteen/sass/site/header/_site-featured-image.scss

@@ -45 +45 @@
                 }
         }
 
+        .main-navigation .sub-menu a {
+                opacity: inherit;
+        }
+
         /* add focus state to social media icons */
         .social-navigation a {
                 &:focus {

src/wp-content/themes/twentynineteen/style-rtl.css

@@ -1190 +1190 @@
   color: #fff;
   display: block;
   line-height: 1.2;
+  text-shadow: none;
   padding: calc( .5 * 1rem) 1rem calc( .5 * 1rem) calc( 24px + 1rem);
   white-space: nowrap;
 }
@@ -2156 +2157 @@
   color: #fff;
 }
 
+.site-header.featured-image .main-navigation .sub-menu a {
+  opacity: inherit;
+}
+
 .site-header.featured-image .social-navigation a:focus {
   color: #fff;
   opacity: 1;

src/wp-content/themes/twentynineteen/style.css

@@ -1190 +1190 @@
   color: #fff;
   display: block;
   line-height: 1.2;
+  text-shadow: none;
   padding: calc( .5 * 1rem) calc( 24px + 1rem) calc( .5 * 1rem) 1rem;
   white-space: nowrap;
 }
@@ -2162 +2163 @@
   color: #fff;
 }
 
+.site-header.featured-image .main-navigation .sub-menu a {
+  opacity: inherit;
+}
+
 .site-header.featured-image .social-navigation a:focus {
   color: #fff;
   opacity: 1;