Fixes #13943 again: lighten links, and text, in navbar. Still not 100% compliant, but it's better.

dist/css/bootstrap.css

@@ -4281,7 +4281,7 @@ fieldset[disabled] .navbar-default .btn-link:focus {
   border-color: #080808;
 }
 .navbar-inverse .navbar-brand {
-  color: #777;
+  color: #9d9d9d;
 }
 .navbar-inverse .navbar-brand:hover,
 .navbar-inverse .navbar-brand:focus {
@@ -4289,10 +4289,10 @@ fieldset[disabled] .navbar-default .btn-link:focus {
   background-color: transparent;
 }
 .navbar-inverse .navbar-text {
-  color: #969696;
+  color: #9d9d9d;
 }
 .navbar-inverse .navbar-nav > li > a {
-  color: #777;
+  color: #9d9d9d;
 }
 .navbar-inverse .navbar-nav > li > a:hover,
 .navbar-inverse .navbar-nav > li > a:focus {
@@ -4339,7 +4339,7 @@ fieldset[disabled] .navbar-default .btn-link:focus {
     background-color: #080808;
   }
   .navbar-inverse .navbar-nav .open .dropdown-menu > li > a {
-    color: #777;
+    color: #9d9d9d;
   }
   .navbar-inverse .navbar-nav .open .dropdown-menu > li > a:hover,
   .navbar-inverse .navbar-nav .open .dropdown-menu > li > a:focus {
@@ -4360,13 +4360,13 @@ fieldset[disabled] .navbar-default .btn-link:focus {
   }
 }
 .navbar-inverse .navbar-link {
-  color: #777;
+  color: #9d9d9d;
 }
 .navbar-inverse .navbar-link:hover {
   color: #fff;
 }
 .navbar-inverse .btn-link {
-  color: #777;
+  color: #9d9d9d;
 }
 .navbar-inverse .btn-link:hover,
 .navbar-inverse .btn-link:focus {

less/variables.less

@@ -369,12 +369,12 @@
 
 // Inverted navbar
 // Reset inverted navbar basics
-@navbar-inverse-color:                      lighten(@gray-light, 12%);
+@navbar-inverse-color:                      lighten(@gray-light, 15%);
 @navbar-inverse-bg:                         #222;
 @navbar-inverse-border:                     darken(@navbar-inverse-bg, 10%);
 
 // Inverted navbar links
-@navbar-inverse-link-color:                 @gray-light;
+@navbar-inverse-link-color:                 lighten(@gray-light, 15%);
 @navbar-inverse-link-hover-color:           #fff;
 @navbar-inverse-link-hover-bg:              transparent;
 @navbar-inverse-link-active-color:          @navbar-inverse-link-hover-color;