* Adding printdialog code.

gtk-3.20/scss/widgets/_misc.scss

@@ -45,6 +45,22 @@
         margin: 0;
         padding: 0;
     }
+
+    printdialog {
+        paper {
+            color: $fg_color;
+            border: 1px solid $borders_color;
+            background: $white;
+            padding: 0;
+
+            &:backdrop {
+                color: $backdrop_fg_color;
+                border-color: $backdrop_borders_color;
+            }
+        }
+
+        .dialog-action-box { margin: $spacing * 2; }
+    }
 }