=== modified file 'Ambiance/gtk-3.20/gtk-widgets.css'
--- Ambiance/gtk-3.20/gtk-widgets.css	2017-10-10 15:48:56 +0000
+++ Ambiance/gtk-3.20/gtk-widgets.css	2017-10-11 08:49:14 +0000
@@ -2428,7 +2428,7 @@
 /* Use a lighter gradient for default (mutter-generated) decorations */
 .maximized .titlebar.default-decoration:not(:backdrop) {
     background-image: -gtk-gradient (linear, left top, left bottom,
-                                     from (shade (@dark_bg_color, 0.96)),
+                                     color-stop (0.2, shade (@dark_bg_color, 0.96)),
                                      to (shade (@dark_bg_color, 1.3)));
 }