adapt.css: darken hover link color

adapt.css

@@ -37,7 +37,7 @@ The content `<div>` is where all your content goes.
 }
 .content a:active,
 .content a:hover {
-  color:#99B9D8;
+  color:#3a8ad5;
   text-decoration:underline;
 }
 /* Wiki page actions */