--- a/gtk-3.20/gtk.scss	Mon Apr 10 16:42:38 2017 +0100
+++ b/gtk-3.20/gtk.scss	Sat May 06 15:42:40 2017 +0100
@@ -8,6 +8,7 @@
 /// TODO:
 /// * Firefox GTK3 defaults to grey page background (".background" CSS rule)
 ///    - https://bugzilla.mozilla.org/show_bug.cgi?id=1268618
+/// * Package Updater header bar button goes light grey when in background and activated
 
 
 $variant: 'light';
@@ -110,6 +111,11 @@
 @define-color wm_button_active_color_b shade(#{$bg_dark_color}, 0.89);
 @define-color wm_button_active_color_c shade(#{$bg_dark_color}, 0.9);
 
+@define-color wm_button_border #{$header_button_border};
+
+@define-color button_emphasis_a #{lighten($header_button_raised_gradient_color_a, 10%)};
+@define-color button_emphasis_b #{lighten(mix($header_button_raised_gradient_color_a, $bg_dark_color, 50%), 10%)};
+@define-color button_emphasis_c #{lighten($bg_dark_color, 10%)};